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Time to turn up the boost... what will it run. RESULTS

Posted By: dizuster

Time to turn up the boost... what will it run. RESULTS - 05/24/13 12:04 AM

Another fun... "what will it run post".

Well me and my ol' man got the trans back together in his lickety split last night, so it's off to mid-michigan with both cars this weekend.

Time to turn up the boost in my junk and see what it'll do.

Last time out [Email]10.99@123.45[/Email] on 8 psi and 22 degree's of timing. That was a 1~2psi launch (with a 1.69 60ft).

Now I have the boost controller working in the car, so I can get some more boost in it on the starting line, and ramp it up as I walk the car off.

Plan on running ~13psi this weekend and sneaking up on the timing. Brought 40 NGK spark plugs with me to tune with... lol

So what do you guys think? Guess away...

Here's a vid of the last time out...

http://www.youtube.com/watch?v=BczGjoE8-ps
Posted By: all spooled up

Re: Time to turn up the boost... what will it run. - 05/24/13 12:30 AM

10.30 135
Posted By: B3422W5

Re: Time to turn up the boost... what will it run. - 05/24/13 12:50 AM

I haven't a clue but you did an incredible job with that car.
Be careful up there in the right lane around half track, it's bumpy and easy to get out of the groove.
Would love to see a 9.99 out of her
Posted By: MR_P_BODY

Re: Time to turn up the boost... what will it run. - 05/24/13 12:54 AM

Well if you an get the timing up enough you should be
a very low 10... maybe a 10.10 to 10.20... have fun boys
Posted By: Clanton

Re: Time to turn up the boost... what will it run. - 05/24/13 01:00 AM

Quote:

Well if you an get the timing up enough you should be
a very low 10... maybe a 10.10 to 10.20... have fun boys




X2
Posted By: 383man

Re: Time to turn up the boost... what will it run. - 05/24/13 01:02 AM

I say faster then my 10.70's. My guess is 10.30's with no trouble. Good luck , Ron
Posted By: MR_P_BODY

Re: Time to turn up the boost... what will it run. - 05/24/13 01:17 AM

Scott... did you get your hood fixed... is it back on?
Posted By: Crizila

Re: Time to turn up the boost... what will it run. - 05/24/13 01:53 AM

Quote:

Another fun... "what will it run post".

Well me and my ol' man got the trans back together in his lickety split last night, so it's off to mid-michigan with both cars this weekend.

Time to turn up the boost in my junk and see what it'll do.

Last time out [Email]10.99@123.45[/Email] on 8 psi and 22 degree's of timing. That was a 1~2psi launch (with a 1.69 60ft).

Now I have the boost controller working in the car, so I can get some more boost in it on the starting line, and ramp it up as I walk the car off.

Plan on running ~13psi this weekend and sneaking up on the timing. Brought 40 NGK spark plugs with me to tune with... lol

So what do you guys think? Guess away...

Here's a vid of the last time out...

http://www.youtube.com/watch?v=BczGjoE8-ps


13 - 15 lbs of boost for the entire run will get you around 10.45 and 125 to 127 MPH range - provided you can keep the 60 fts under 1.65.
Posted By: dizuster

Re: Time to turn up the boost... what will it run. - 05/24/13 03:34 PM

Hoods all fixed... fits right in with the rest of the "look". LOL...

I think the ET/MPH will depend a lot on how good it hooks, and how much more timing it will take.

I figure 4~5psi should be worth about 60~80hp just with the boost change, maybe more if the timing was way off the first time out.

I'd be happy if it went in the 10.50's. Anything better then that and I'd be VERY happy.

Not to mention if it goes in the 40's or better, I'd REALLY start to wonder how long the shortblock will last... lol

Attached picture 7717358-fixedhood.jpg
Posted By: MR_P_BODY

Re: Time to turn up the boost... what will it run. - 05/24/13 03:45 PM

I didnt notice the the dent in the fender when I hung
the turbo... did that happen with the hood.... good
luck this weekend.. I see your dad wont be running this
weekend(bummer about his car)
Posted By: Clanton

Re: Time to turn up the boost... what will it run. - 05/24/13 05:09 PM

What fuel r u using?
Posted By: MR_P_BODY

Re: Time to turn up the boost... what will it run. - 05/24/13 06:13 PM

Quote:

What fuel r u using?




Scott runs E-85.. I hope he has some summer grade to run
Posted By: dizuster

Re: Time to turn up the boost... what will it run. - 05/25/13 12:36 PM

Got some passes in last night. I'm having trouble getting the car from Trans brake release to full boost. Takes over 1 second to get there....might have a boost leak.

Also found out that my boost gauge was off, so what I thought was 8psi last time out was really 10psi. So even I went to 13psi last night, it was only a 3psi change.

That all being said...it ran 10.67@127.71!!!

The most amazing part is that we got it to leave on 8psi @ 4600rpm!

1.58 60ft actually had the front tire 2~ 3 inches up.

Just need to get the boost in quicker after the Trans brake release and the 60ft should come down.

Incredibly enough it went 10.67, 10.69, 10.69 back to back to back. Might even be able to go some rounds today!
Posted By: Clanton

Re: Time to turn up the boost... what will it run. - 05/25/13 12:49 PM

Adding fuel to the tune can help the turbo and make it safer to run.
Posted By: dizuster

Re: Time to turn up the boost... what will it run. - 05/25/13 01:12 PM

It's got a LOT of fuel off the hit. Under 11:1 a/f off the hit, then settles down to about 11.5:1 down track.

Fuel tested 86%.
Posted By: Cab_Burge

Re: Time to turn up the boost... what will it run. - 05/25/13 01:17 PM

You might want to try a liitle more total timing on the lower boost levels, under 9 lbs I don't remember the details of your build, motor type, head type and which alloy on the heads Be safe, when in doubt, pull it back
Posted By: tboomer

Re: Time to turn up the boost... what will it run. - 05/25/13 01:35 PM

Nice!! I just love that sleeper car..
Posted By: Dodgem

Re: Time to turn up the boost... what will it run. - 05/25/13 01:38 PM

Quote:

It's got a LOT of fuel off the hit. Under 11:1 a/f off the hit, then settles down to about 11.5:1 down track.

Fuel tested 86%.




This is interesting But I thought the AFR numbers with E85 had to be much lower 9.7 cruise and 7 to 8 max output?? Or am I way off??

Cool Car like it!
Posted By: dizuster

Re: Time to turn up the boost... what will it run. - 05/25/13 01:46 PM

I tried more timing, car didn't like it. 21 is all it seems to want.

You are right on the a/f numbers for e85, I just read them on the gasoline scale to make it easy.
Posted By: Crizila

Re: Time to turn up the boost... what will it run. - 05/25/13 01:51 PM

Quote:

Got some passes in last night. I'm having trouble getting the car from Trans brake release to full boost. Takes over 1 second to get there....might have a boost leak.

Also found out that my boost gauge was off, so what I thought was 8psi last time out was really 10psi. So even I went to 13psi last night, it was only a 3psi change.

That all being said...it ran [Email]10.67@127.71!!![/Email]

The most amazing part is that we got it to leave on 8psi @ 4600rpm!

1.58 60ft actually had the front tire 2~ 3 inches up.

Just need to get the boost in quicker after the Trans brake release and the 60ft should come down.

Incredibly enough it went 10.67, 10.69, 10.69 back to back to back. Might even be able to go some rounds today!


Congrats. You are living proof that you can make a box of velveeta cheese go fast with enough boost.
Posted By: MR_P_BODY

Re: Time to turn up the boost... what will it run. - 05/25/13 01:51 PM

Quote:

Got some passes in last night. I'm having trouble getting the car from Trans brake release to full boost. Takes over 1 second to get there....might have a boost leak.

Also found out that my boost gauge was off, so what I thought was 8psi last time out was really 10psi. So even I went to 13psi last night, it was only a 3psi change.

That all being said...it ran [Email]10.67@127.71!!![/Email]

The most amazing part is that we got it to leave on 8psi @ 4600rpm!

1.58 60ft actually had the front tire 2~ 3 inches up.

Just need to get the boost in quicker after the Trans brake release and the 60ft should come down.

Incredibly enough it went 10.67, 10.69, 10.69 back to back to back. Might even be able to go some rounds today!




Cool.... what did you get the timing up to... hope
you get some rounds in today
Posted By: Mr.Yuck

Re: Time to turn up the boost... what will it run. - 05/25/13 02:27 PM

good running I was goning to say if all goes well you should pick up 4-5 tenths. I wonder if you went up on the gear if that would help? You have 2.76's correct? maybe try 2.94's or 3.23's Does anybody make a 3.08 for an 8.75???
Posted By: MR_P_BODY

Re: Time to turn up the boost... what will it run. - 05/25/13 02:41 PM

Quote:

good running I was goning to say if all goes well you should pick up 4-5 tenths. I wonder if you went up on the gear if that would help? You have 2.76's correct? maybe try 2.94's or 3.23's Does anybody make a 3.08 for an 8.75???




The shallow gear loads the turbo harder than a steeper
gear BUT he is giving up low end acceleration.. there
is a happy balance with the gears... I know he put
in what he had laying around... the gear that was
in it when I put the turbo on it was SCARY noisy
with clunks and what not(it was the worst sounding
gear I ever heard that was still rolling)
Posted By: TheOtherDodge

Re: Time to turn up the boost... what will it run. - 05/25/13 04:51 PM

Congrats on the et my turbo brother!
Posted By: Duner

Re: Time to turn up the boost... what will it run. - 05/25/13 05:06 PM

Great job!

More boost is always more better! LOL

What are you using to tune this with?

On my MS3X setup - I set the launch limiter for roughly 2,000 rpm less than the convertor flashes to - and make the timing zero when on the button. That gets me full boost but still holds it back. When I let go of the button - I give it 36° of timing between the launch rpm and the convertor flash rpm, then back to 22° for the rest of the pass.

This setup lets me leave at full boost and makes the thing rocket out of the hole. It will take the extra timing because it's free-revving before it gets full load against the convertor.
Posted By: sbsatellite

Re: Time to turn up the boost... what will it run. - 05/25/13 07:06 PM

Congrats...I cant wait for mine to be done. If i can ever get someone to drop off the parts...
Posted By: dizuster

Re: Time to turn up the boost... what will it run. - 05/26/13 02:19 PM

Ran again yesterday. Those little tires do NOT like the sun. 10.90@127...lol
Posted By: MR_P_BODY

Re: Time to turn up the boost... what will it run. - 05/26/13 02:28 PM

Quote:

Ran again yesterday. Those little tires do NOT like the sun. [Email]10.90@127...lol[/Email]




Scott... do you have adjustable rear shocks... if
you do, loosen up the extension
Posted By: smokinwoody

Re: Time to turn up the boost... what will it run. - 05/26/13 03:22 PM

Quote:

Quote:

Got some passes in last night. I'm having trouble getting the car from Trans brake release to full boost. Takes over 1 second to get there....might have a boost leak.

Also found out that my boost gauge was off, so what I thought was 8psi last time out was really 10psi. So even I went to 13psi last night, it was only a 3psi change.

That all being said...it ran [Email]10.67@127.71!!![/Email]

The most amazing part is that we got it to leave on 8psi @ 4600rpm!

1.58 60ft actually had the front tire 2~ 3 inches up.

Just need to get the boost in quicker after the Trans brake release and the 60ft should come down.

Incredibly enough it went 10.67, 10.69, 10.69 back to back to back. Might even be able to go some rounds today!




Cool.... what did you get the timing up to... hope
you get some rounds in today





I agree on the timing.

my SB Chevy w/Weiand 142 blower on 93 pump and some octain boost, likes 18* initial and 36* all in at 3K....and thats at 12psi...of course I don't have the volume you do, but you are running a cooler fuel...
Posted By: Mr.Yuck

Re: Time to turn up the boost... what will it run. - 05/26/13 05:42 PM

Quote:

Quote:

good running I was goning to say if all goes well you should pick up 4-5 tenths. I wonder if you went up on the gear if that would help? You have 2.76's correct? maybe try 2.94's or 3.23's Does anybody make a 3.08 for an 8.75???




The shallow gear loads the turbo harder than a steeper
gear BUT he is giving up low end acceleration.. there
is a happy balance with the gears... I know he put
in what he had laying around... the gear that was
in it when I put the turbo on it was SCARY noisy
with clunks and what not(it was the worst sounding
gear I ever heard that was still rolling)





can't believe goint to a 2.94 or 3.23 would hurt anything... did he switch to a glide???
Posted By: MR_P_BODY

Re: Time to turn up the boost... what will it run. - 05/26/13 05:48 PM

Quote:

Quote:

Quote:

good running I was goning to say if all goes well you should pick up 4-5 tenths. I wonder if you went up on the gear if that would help? You have 2.76's correct? maybe try 2.94's or 3.23's Does anybody make a 3.08 for an 8.75???




The shallow gear loads the turbo harder than a steeper
gear BUT he is giving up low end acceleration.. there
is a happy balance with the gears... I know he put
in what he had laying around... the gear that was
in it when I put the turbo on it was SCARY noisy
with clunks and what not(it was the worst sounding
gear I ever heard that was still rolling)





can't believe goint to a 2.94 or 3.23 would hurt anything... did he switch to a glide???




Its a 727... I dont think the 3.23 would hurt either
but the lesser gears do load the turbo harder which
is what makes the boost

Posted By: Mr.Yuck

Re: Time to turn up the boost... what will it run. - 05/26/13 06:24 PM

Quote:

Quote:

Quote:

Quote:

good running I was goning to say if all goes well you should pick up 4-5 tenths. I wonder if you went up on the gear if that would help? You have 2.76's correct? maybe try 2.94's or 3.23's Does anybody make a 3.08 for an 8.75???




The shallow gear loads the turbo harder than a steeper
gear BUT he is giving up low end acceleration.. there
is a happy balance with the gears... I know he put
in what he had laying around... the gear that was
in it when I put the turbo on it was SCARY noisy
with clunks and what not(it was the worst sounding
gear I ever heard that was still rolling)





can't believe goint to a 2.94 or 3.23 would hurt anything... did he switch to a glide???




Its a 727... I dont think the 3.23 would hurt either
but the lesser gears do load the turbo harder which
is what makes the boost






I'd think the 3.23 would build boost at lauch, we aren't talking about a 2600lb car here. I do know my next build will be a twin whisle car... for sure.
Posted By: dizuster

Re: Time to turn up the boost... what will it run. - 05/26/13 10:29 PM

More load = more boost. Gear would hurt the spool.

But its already definitely tire limited, who needs more torque to the tires? Lol

Yeah mike, I have adjustable shocks, just need done test and tune time with it to play around.
Posted By: TheOtherDodge

Re: Time to turn up the boost... what will it run. - 05/27/13 04:15 AM

What rpm are you leaving at, shifting at, and crossing? What cam?
Posted By: dizuster

Re: Time to turn up the boost... what will it run. - 05/27/13 04:23 AM

Friday left at 4400 / 8psi. Shift about 5800. Crosses the stripe at 5500.

Cam is 224/218@.050", 114Las, .500" lift.
Posted By: TheOtherDodge

Re: Time to turn up the boost... what will it run. - 05/27/13 04:51 AM

You need more gear.

I leave at 3800, 5 lbs boost, shift at 6000 and cross at 6000. .520 hydraulic roller, 220 duration.
Posted By: challengermike

Re: Time to turn up the boost... what will it run. - 05/27/13 12:53 PM

Quote:

More load = more boost. Gear would hurt the spool.

But its already definitely tire limited, who needs more torque to the tires? Lol

Yeah mike, I have adjustable shocks, just need done test and tune time with it to play around.




Im not sure I agree with this. Quicker rpm = more exhaust flow which equals quicker boost. There is a point where to much gear isn't helping spool but I don't think your even close to that. Stock Grand Nationals had 3.42s and spooled real fast/Of course the turbo was small also. My old gn had a 6157 turbo and I used to foot brake to about 2,800 and it was about 10 pounds of boost. But as soon as I let off the brake it would shoot up to 28 pounds.
Posted By: dizuster

Re: Time to turn up the boost... what will it run. - 05/27/13 01:39 PM

This thing has lots of issues really. It's got it's tongue hanging out at 6k, and it's beyond done pulling. So more gear would mean more finish line rpm. Crosses the stripe at 5500 already, so there really isn't much room in the room range to fix that. However the converter is slipping 25%, so if I could fix that the rpm might come down. It's possible that the gear would help the slip too, but I don't know that for sure.

Also, I can build more boost on the starting line, that's not an issue. But the 255/60 drag radials won't take any more. So again another reason why more gear would seem to be going the wrong way.

Hard to say. I am 100% certain that the combo could be better, but I'm not sure if I want to spend any more money on the 8 3/4" (how hard can you really leave in a 3700lbs car and a Trans brake!), or if I want to put more cam in it for done more rpm (with the stock rods!)
Posted By: gdonovan

Re: Time to turn up the boost... what will it run. - 05/27/13 01:56 PM

Quote:

This thing has lots of issues really. It's got it's tongue hanging out at 6k, and it's beyond done pulling.




4-cylinder stuff so take it for what its worth..

1) The Reliant would go quicker and quicker the more the final drive ratio was lowered, started out with a 3.50 ratio and final change was all the way down to 2.60. Car would come out of the hole with 27 pounds of boost and inside a second or two be at 35 psi.

I'd shift at 5500 and the engine would be done at 6000. 2.5 was a torque monster making over 500 ft/lbs

2) Optimum air fuel ratio of the car was around 12:1 under boost and go through the traps at 1650-1700 EGT with probes about an inch out from the number two and four exhaust port.

Turbos LOVE load, my advice is to change the rear end gearing. The top fuel guys found this out years ago but NHRA froze the final drive gearing because the speeds were getting too high on the top end.

Notice the car has no problem launching and is pretty much in third gear right away (10.41 at 132 mph)-

http://www.ebay.com/sch/sam_rambo/m.html...=p2047675.l2562

If I remember right, this is with a 24.5" M&H slick down at Cecil County.


Posted By: Dodgem

Re: Time to turn up the boost... what will it run. - 05/27/13 02:38 PM

Well it sure as heck is cool and interesting!

Posted By: Darryls-Demon

Re: Time to turn up the boost... what will it run. - 05/28/13 12:38 AM

I need to stop reading your track updates, every time I do makes me want to build a turbo motor for my dart.
Posted By: buck440

Re: Time to turn up the boost... what will it run. - 05/28/13 01:35 AM

that thing is awesome!!! i love it
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