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Wanna hear what boost can do? #676995
04/22/10 08:14 AM
04/22/10 08:14 AM
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Oakland, MI
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dizuster Offline OP
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Ok first off, this is about a Ford. I don’t condone owning one, or even liking them. I’m just passing on the facts because if a Ford can do it, I’m sure a Mopar could do it better…

So I work with a young kid who bought a 5.0 mustang at the end of last year. It’s an ’86 and I’m pretty sure it was the last virgin unmodified 5.0 mustang on the planet. So he puts a set of drag radials on it, and a 3.73 gear. It immediately breaks the trans. So over the winter it got a good clutch, and a decent trans.

This sping he’s been talking to me about hopping it up. Headers, intake, heads, cam, etc… I kept telling him, “why don’t you just buy a turbo kit for it?” So finally he took my advice. $1500 spent on ebay, and his Turbo kit shows up at his door. Fuel pump, injectors, turbo, headers, most of the piping, and a little intercooler.

So he puts this kit on… It went to the chassis dyno and in N/A stock (waste gate open, so no boost) form it made 185hp to the wheels. Pretty much on par for a DEAD stock mustang.

So then on the first turbo pull, he tells me that at 9psi of boost, they had to shut it down because they were worried it was going to break the block. 540ft/lbs at the tires at 3800rpm.

At this point, I’m thinking…”uh huh…sure it did.”

So they take some timing out of it, and make some more pulls. At 9psi, on pump gas, with only 18 degree’s it “supossidly” made 420HP to the wheels and 510ft/lbs.

And again, I’m thinking…”uh huh…sure it did.”

Later in the week, we were talking about the whole thing. I told him, “Eric, it’s not that I’m trying to be a jerk or anything, but don’t you think that Dyno might be a little happy? I mean, you picked up 235HP, on a 185HP base motor, with only 9psi of boost, and even less then stock timing…” He kind of saw my point, and I think he was a little skeptical too then.

Well the car went to the track yesterday. Granted this kid has probably only made 20 passes down the strip in his whole life, so he’s not exactly Ronnie Sox’s.

11.99@117mph.

Guess I’ll be eating my hat for lunch today…

Just amazing.

I had a dream last night that I bought a $500 Cordoba with a low compression smog 400 in it, just so I could slap a turbo on it…

Re: Wanna hear what boost can do? [Re: dizuster] #676996
04/22/10 08:21 AM
04/22/10 08:21 AM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
Not enough dumb comments...yet

Joined: Jan 2003
Posts: 24,562
Brookeville, Md
boost is silly. It flat works. no need for big bumpy cams, high stall or tall gears. I dropped a full second off my et w/ 5.5 lbs of boost on a mild 440. And I didn't tune it much. Probably left some on the table and would have run better w/ 3.73's over the .91's I had. My next build will be boosted. You can have you cake and eat it.


[IMG]http://i66.tinypic.com/pui5j.jpg[/IMG]
Coming soon!!!!
Re: Wanna hear what boost can do? [Re: Mr.Yuck] #676997
04/22/10 08:51 AM
04/22/10 08:51 AM
Joined: Jan 2005
Posts: 3,635
Oakland, MI
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dizuster Offline OP
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dizuster  Offline OP
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Sorry correction. It went 11.90@118...

He weighed it at Milan too. 3595lbs (Stock '86 GT, +Turbo, +intercooler, +heavier trans, +him in it, +frame connectors)

Just blows my mind.

Re: Wanna hear what boost can do? [Re: dizuster] #676998
04/22/10 09:11 AM
04/22/10 09:11 AM
Joined: Nov 2003
Posts: 1,969
Chandler, AZ
Duner Offline
top fuel
Duner  Offline
top fuel

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Posts: 1,969
Chandler, AZ
There's no doubt about the fact that boost just flat out works!

I do question the amount of boost vs the numbers though. It sounds like he's putting more than 9 psi of boost to it to me. The math sounds more like 15 psi.

Re: Wanna hear what boost can do? [Re: Duner] #676999
04/22/10 09:20 AM
04/22/10 09:20 AM
Joined: Jan 2005
Posts: 3,635
Oakland, MI
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dizuster Offline OP
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LOL... that's what I said too. But I saw it with my own eyes. Not to mention it went to a reputable ford dyno, and they were shooting for 400hp at 8~9psi of boost. They said they do it all the time.

The physics just don't add up for me, but the proof is in the pudding.

Re: Wanna hear what boost can do? [Re: Duner] #677000
04/22/10 09:31 AM
04/22/10 09:31 AM
Joined: Oct 2004
Posts: 8,165
Left Coast
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BobR Offline
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I'd show you guys what a broken exhaust valve can do to a 3500 dollar turbo but the picture is on my home computer.

Re: Wanna hear what boost can do? [Re: dizuster] #677001
04/22/10 09:37 AM
04/22/10 09:37 AM
Joined: May 2008
Posts: 1,238
North Cackilacky
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sdaurity Offline
pro stock
sdaurity  Offline
pro stock
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North Cackilacky
See it all the time down here and do alot for guys around here. They just flat out get it done with nothing. That is why fox bodys are so popular not that they are mustangs, but they are cheap and will run very well with very little money put to them..


One day I will have something cool here.
Re: Wanna hear what boost can do? [Re: sdaurity] #677002
04/22/10 12:30 PM
04/22/10 12:30 PM
Joined: Feb 2007
Posts: 2,578
sweden
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1Fast340 Offline
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sweden
this topic makes me real happy since im building a boosted engine thats a very good result

Re: Wanna hear what boost can do? [Re: 1Fast340] #677003
04/22/10 02:31 PM
04/22/10 02:31 PM
Joined: Jan 2003
Posts: 2,697
Renton Wa
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topfueldart Offline
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Renton Wa
My combination is basically the same, except in mopar land. Its a 318 with stock small valve heads, a 467/494 Crane Cam, Air Gap and 650 DP. 3.54 gear, and 28 inch tire in a 3350 lb plus me and junk in the trunk makes it 3550 raceweight, 68 Dart. The heads are a major restriction, but on 13 lbs the car just went 11.48 @ 120 on pump gas with water/meth. Without boost, im sure it would be a mid 14 second car.

Except I built the kit, didnt buy it.

I wanted to show what could be done with a cheap motor, im willing to bet an edelbrock head swap would be worth 100 horse, easy.

Last edited by topfueldart; 04/22/10 02:34 PM.

11.48 @ 120 with a 1.80 60' 318, stock 1.88 heads, stock 904, Pump Gas, 13 lbs of boost.

9.94 @ 134, 318 on pump gas, 14 lbs w/ Eddies, transbrake 727, 3600 lbs, 3.54 gear and 28's.
Re: Wanna hear what boost can do? [Re: topfueldart] #677004
04/22/10 02:53 PM
04/22/10 02:53 PM
Joined: Aug 2006
Posts: 1,884
Tracy CA
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rabid scott Offline
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Tracy CA
Well, get us all excited will ya!

Last time I had my Challenger to the track it ran a best of 13.9 @ 100 with an old stock 1968 375 horse 440 with headers and a 750 Holley.

I wonder what I'll pick up with a few PSI thrown at it?


Re: Wanna hear what boost can do? [Re: rabid scott] #677005
04/22/10 02:59 PM
04/22/10 02:59 PM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
Not enough dumb comments...yet

Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Quote:

Well, get us all excited will ya!

Last time I had my Challenger to the track it ran a best of 13.9 @ 100 with an old stock 1968 375 horse 440 with headers and a 750 Holley.

I wonder what I'll pick up with a few PSI thrown at it?





This was a mild 440 build maybe 9:1 w/ a summit cam stock 906 heads, RPm intake, 750 Proformed main body DP, headers, 175k stall and 3.91's. Ran 12.90's in good cool air. 12.98-13.03 in the warm months. I put on this almost undersized SN-2000 and ran 12.08 w/o any tuning..on about 5.5-6psi of boost. It ran in the 12.0's untill I melted #3 (my fault) tossed another piston in and slapped a 8psi pully on it, but sold it in the staging lane before I could run it. Ran all day that day at 12.38 shifting way early and coming out soft. Probably could have run 11.7's easy.

5940977-sc2aa.JPG (51 downloads)
Re: Wanna hear what boost can do? [Re: rabid scott] #677006
04/22/10 04:09 PM
04/22/10 04:09 PM
Joined: Oct 2004
Posts: 8,165
Left Coast
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BobR Offline
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Left Coast
Quote:

Well, get us all excited will ya!

Last time I had my Challenger to the track it ran a best of 13.9 @ 100 with an old stock 1968 375 horse 440 with headers and a 750 Holley.

I wonder what I'll pick up with a few PSI thrown at it?






Rule of thumb is approx 30 hp per boost pound.

Re: Wanna hear what boost can do? [Re: BobR] #677007
04/22/10 06:31 PM
04/22/10 06:31 PM
Joined: Oct 2004
Posts: 354
Livonia Michigan
440dart Offline
enthusiast
440dart  Offline
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Posts: 354
Livonia Michigan
Quote:

I'd show you guys what a broken exhaust valve can do to a 3500 dollar turbo but the picture is on my home computer.


I cant show you the turbo, but i can show you the piston and head.

5941284-0420001157.jpg (99 downloads)

Yes I live in Michigan, so there is still 1 light on
Re: Wanna hear what boost can do? [Re: BobR] #677008
04/22/10 06:32 PM
04/22/10 06:32 PM
Joined: Oct 2004
Posts: 354
Livonia Michigan
440dart Offline
enthusiast
440dart  Offline
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Posts: 354
Livonia Michigan
Quote:

I'd show you guys what a broken exhaust valve can do to a 3500 dollar turbo but the picture is on my home computer.



Piston

5941286-0420001126.jpg (107 downloads)

Yes I live in Michigan, so there is still 1 light on
Re: Wanna hear what boost can do? [Re: 440dart] #677009
04/22/10 06:51 PM
04/22/10 06:51 PM
Joined: Jul 2005
Posts: 8,647
ELYRIA,OH
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blownzoom440 Offline
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ELYRIA,OH
looks like the valves were shaking around in there for a while.

Re: Wanna hear what boost can do? [Re: BobR] #677010
04/22/10 09:43 PM
04/22/10 09:43 PM
Joined: Dec 2007
Posts: 12,588
Great Neck,LI,new york
hemi-itis Offline
I Live Here
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Posts: 12,588
Great Neck,LI,new york
Quote:

Quote:

Well, get us all excited will ya!

Last time I had my Challenger to the track it ran a best of 13.9 @ 100 with an old stock 1968 375 horse 440 with headers and a 750 Holley.

I wonder what I'll pick up with a few PSI thrown at it?






Rule of thumb is approx 30 hp per boost pound.


Bob,What's the rule of thumb with a roots blower??


HEMI-ITIS has no cure.
My condition is fully BLOWN!!
Re: Wanna hear what boost can do? [Re: hemi-itis] #677011
04/22/10 10:52 PM
04/22/10 10:52 PM
Joined: Jul 2005
Posts: 8,647
ELYRIA,OH
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blownzoom440 Offline
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Posts: 8,647
ELYRIA,OH
Quote:

Quote:

Quote:

Well, get us all excited will ya!

Last time I had my Challenger to the track it ran a best of 13.9 @ 100 with an old stock 1968 375 horse 440 with headers and a 750 Holley.

I wonder what I'll pick up with a few PSI thrown at it?






Rule of thumb is approx 30 hp per boost pound.


Bob,What's the rule of thumb with a roots blower??



i think it is more like 40hp per lb but also think it has to do with size of engine and head flow combined.

Re: Wanna hear what boost can do? [Re: blownzoom440] #677012
04/23/10 09:02 AM
04/23/10 09:02 AM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
Not enough dumb comments...yet

Joined: Jan 2003
Posts: 24,562
Brookeville, Md
more about how much air flow you can get as opposed to how much boost.

Re: Wanna hear what boost can do? [Re: Mr.Yuck] #677013
04/23/10 09:11 AM
04/23/10 09:11 AM
Joined: Jan 2006
Posts: 452
nc
cold85 Offline
mopar
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mopar

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Posts: 452
nc
we made over 800 to the tires with a good set of heads and stock rods pistons crank and block
this run was on 275's

Re: Wanna hear what boost can do? [Re: cold85] #677014
04/23/10 09:25 AM
04/23/10 09:25 AM
Joined: Jan 2005
Posts: 3,635
Oakland, MI
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dizuster Offline OP
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dizuster  Offline OP
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Oakland, MI
How long did that short block last at that power?!

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