Moparts
Your ET's with RHS iron heads
Posted By: Wedgeman
Your ET's with RHS iron heads - 08/27/10 11:05 PM
HI guys !!
For reference....shouw YOUR et's with your combo
using the RHS iron heads 1.92 or 2.02 int
My set up doesn't perform at all !
360 Magnum block
4.0 in stroker crank = 408 cu
RHS heads
10.1:1 cr
250/250 flat tappet mecanical cam .525 lift
1.6 adjustable crane rockers
998 trans 2.77 first gearset
3.91 rearend with spool
3800 stall converter
28'' ET drag tires
Dan
Posted By: cudadoug
Re: Your ET's with RHS iron heads - 08/27/10 11:53 PM
For a street version of an RHS based 410:
https://board.moparts.org/ubbthreads/show...part=1&vc=1Our 12.2:1 CR RHS-headed 416 has been 10.33 @ 131 at 3100# through the muffs. Granted, this is more race car than street car with a spool, 8" converter, etc. It also has a 2.45 low gear 904.
Not knowing you timeslip deatails, the first thing that I notice is a low 1st gear coupled with a pretty tight conveter. It needs "flash" off the starting line to get it moving.
Tell us more...
Posted By: RAMM
Re: Your ET's with RHS iron heads - 08/28/10 01:51 AM
I'm not too far away and I have some info on those heads. Gimmee a shout on Monday at the shop 613-931-2157. J.Rob
Posted By: CompWedgeEngines
Re: Your ET's with RHS iron heads - 08/28/10 02:30 AM
I immediately questioned converter as well.
Distributor, carb and timing info?
Post a time slip for us.
Posted By: Wedgeman
Re: Your ET's with RHS iron heads - 08/28/10 02:39 AM
What's wrong with the converter ????
RT .533
60 ft 2.23
1/8 8.8 82.8 mph
1/4 13.6 99.3 mph
IT JUST SUCKS !!!!!!!!
Posted By: CompWedgeEngines
Re: Your ET's with RHS iron heads - 08/28/10 02:54 AM
A couple things stand out:
#1 Your 60' is killing you. Real bad. That is drastically hurting the ET
#2 I'm not so sure I'd be running 1.6 rockers on that. I am assuming these are untouched heads?
#3 Your back half MPH ( from 1/8th to 1/4 ) is a little weak. Its not pulling enough MPH there.
I'd concentrate on that 60' first. It will really improve that ET. How many passes have you made in it? Is it bogging, spinning, coughing etc on the launch?
What jets are in the carb?
Posted By: RobX4406
Re: Your ET's with RHS iron heads - 08/28/10 03:11 AM
That combo should be making in excess of 460hp
The converter isn't bad if it truly is a 3800. Brian's Duster with my 3500 verter went 1.43ish 60's.
There is something wrong, the MPH is very low. Should be in the mid 90's at 1/8th post if this is a 3300 pound car.
If this is in a 4500 pound tank, then take that into account.
Posted By: HotRodDave
Re: Your ET's with RHS iron heads - 08/28/10 03:53 AM
How are you launching it?
What carb?
Posted By: StrokerPost
Re: Your ET's with RHS iron heads - 08/28/10 04:15 AM
My first thoughts are, what distributor are you running, how is it set up and where ya got the timing set? Also, as someone else mentioned, what jets are in the carb and does it have power valves in it? If these things are in check I would have to ask if you are sure the converter is good? Everything else being in check it could be a bad converter to knock performance down that badly.
Posted By: Wedgeman
Re: Your ET's with RHS iron heads - 08/28/10 06:04 AM
Sorry I left that out
I have a holley 800 cfm with 73 front and 86 rear ( stock )
Top of a M1 mainifold
Dan
Posted By: HotRodDave
Re: Your ET's with RHS iron heads - 08/28/10 06:06 AM
Are you 100% sure the carb is opening 100% ?
Posted By: HotRodDave
Re: Your ET's with RHS iron heads - 08/28/10 06:08 AM
What RPM are you shifting at?
Posted By: earthmover
Re: Your ET's with RHS iron heads - 08/28/10 08:45 AM
Hay. How bout post your time slip
Posted By: 1Fast340
Re: Your ET's with RHS iron heads - 08/28/10 10:37 AM
Quote:
Hay. How bout post your time slip
Quote:
RT .533
60 ft 2.23
1/8 8.8 82.8 mph
1/4 13.6 99.3 mph
there is something very off here, unless this motor lives in a motorhome or something like that..
i bet its something very simple when you find it like carb not opening all the way maybe even not halfway or something else like that. or like writen earlier what does the car do how does it behave in the 60´
you will find the problem im sure 
Posted By: MR_P_BODY
Re: Your ET's with RHS iron heads - 08/28/10 01:02 PM
Are you spinning off the line... what is the cam
degreed in at
Posted By: SeanD
Re: Your ET's with RHS iron heads - 08/28/10 02:03 PM
Is this engine in an A, B, C or E body????
What size fuel line from tank to carb?
Can you push the car on a flat/level surface without much effort?
What type/size tires are on car?
A lot of info is missing!
Posted By: Wedgeman
Re: Your ET's with RHS iron heads - 08/28/10 02:25 PM
HI guys !
The engine is in a 67 Barracuda
Yes there was alot of slippage, non glue at the track, but even that, I should have a better top speed..
I checked the carb before going there
There is more effort to push a car with a spool for sure...
I start thinking may be the problem is in the trans itself.....
Dan
Posted By: dannysbee
Re: Your ET's with RHS iron heads - 08/28/10 03:35 PM
The car will be harder to push if you are turning only, in a straight line it should be fairly easy to push. Your 60' is terrible but the mile per hour is way off also. There is something wrong whether it be timing, carburation, fuel delivery, engine or drive-train. Pick a spot and sort it out.
Posted By: abodiesonly1
Re: Your ET's with RHS iron heads - 08/28/10 04:00 PM
Was this engine bought assembled or did you or another builder put it together with known components?
Posted By: Quicksilver440
Re: Your ET's with RHS iron heads - 08/28/10 05:06 PM
Quote:
HI guys !
The engine is in a 67 Barracuda
Yes there was alot of slippage, non glue at the track, but even that, I should have a better top speed..
I checked the carb before going there
There is more effort to push a car with a spool for sure...
I start thinking may be the problem is in the trans itself.....
Dan
How did you check the carb to make sure you were getting WOT?
Posted By: Wedgeman
Re: Your ET's with RHS iron heads - 08/29/10 02:08 AM
I had someone step on the pedal while I was looking at the venturis
THis is a stroker kit assembled by an engine builder
Dan
Posted By: HotRodDave
Re: Your ET's with RHS iron heads - 08/29/10 02:49 AM
How is your timing? If you used the factory timing marks have you checked the timing marks VS the actual piston position? Sometimes the marks don't line up where the should be.
Is it missing or bogging at all?
Posted By: tjmarcus1
Re: Your ET's with RHS iron heads - 08/29/10 05:05 AM
SOMETHING IS WAY OFF!!!!!!!!!!!!!!!!! i used the caps to stress a point. it's not the vert or the trans.{ it should be faster than that with a stock vert and a 3.23 gear. small exhaust? cam off a tooth? no timing? too much timing?{which i doubt,it would probably be kicking back against the starter]
Posted By: joedust451
Re: Your ET's with RHS iron heads - 08/29/10 10:58 PM
Quote:
SOMETHING IS WAY OFF!!!!!!!!!!!!!!!!! i used the caps to stress a point. it's not the vert or the trans.{ it should be faster than that with a stock vert and a 3.23 gear. small exhaust? cam off a tooth? no timing? too much timing?{which i doubt,it would probably be kicking back against the starter]
Yeah no s#it lol, something is definitly off, my piss ass junkyard 360 magnum with RHS heads run 12.5s @ 105 shifting @ 5100, make sure its getting good fuel supply. I'm also running a spool, its very easy to push on a straight!
Posted By: Wedgeman
Re: Your ET's with RHS iron heads - 08/30/10 12:47 AM
I know something is wrong , but what ???
Yes there was a lot of slippage thursday at the track, non glue on the pavement on thursdays, my 60 ft was killing me for sure !!timing is ok, 180 psi on every cylinder, 250/294 mec cam...I have all the rught stuff !! I will sure put my finger on it.........I took the engine out today, just to see........
Dan
Posted By: patrick
Re: Your ET's with RHS iron heads - 08/30/10 01:12 PM
Quote:
What's wrong with the converter ????
RT .533
60 ft 2.23
1/8 8.8 82.8 mph
1/4 13.6 99.3 mph
IT JUST SUCKS !!!!!!!!
what intake/carb?
how heavy is the car?
what do you have for exhaust?
I agree with others, your 60' sucks...cut it down to the 1.50's and you're in the mid 12's, possibly...
but your MPH isn't too high, so it almost seems like it's laying down on the big end?
Posted By: SeanD
Re: Your ET's with RHS iron heads - 08/30/10 05:30 PM
If the car is hard to push in a straight line on a flat level surface look at the brakes hanging up first then make sure rear housing is NOT bent.
If you have a mechanical fuel pump with 5/16 fuel line switch to electric fuel pump and min. 3/8 line.
What type/manufacturer is your convertor? Money spent on a cheap convertor is wasted money.
Good luck.
Posted By: Wedgeman
Re: Your ET's with RHS iron heads - 08/31/10 01:28 AM
OK....just to keep you informed
Took the engine out to see..
Looks like one rod bearing shot and the mains
are in very bad shape.....too bad I waisted money on an engine builder for assy,.....sould have done it myself as usual.
Dan
Posted By: cudadoug
Re: Your ET's with RHS iron heads - 08/31/10 01:55 AM
Quote:
OK....just to keep you informed
Took the engine out to see..
Looks like one rod bearing shot and the mains
are in very bad shape.....too bad I waisted money on an engine builder for assy,.....sould have done it myself as usual.
Dan
What the...?? How old was this motor? Hopefully the "builder" will stand behind it.
Posted By: Wedgeman
Re: Your ET's with RHS iron heads - 08/31/10 03:17 AM
Not even 400 miles on the motor.....and I stand alone.
Dan
Posted By: joedust451
Re: Your ET's with RHS iron heads - 08/31/10 04:29 AM
Quote:
Not even 400 miles on the motor.....and I stand alone.
Dan
I wouldn't let that machinest touch it again 
, fix it yourself.
Posted By: Wedgeman
Re: Your ET's with RHS iron heads - 08/31/10 10:26 PM
.....And with you guys, I'm bulletproof !!
Can't do worst anyway
Dan