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| How to pick up .15 ET | Login/Join |
DRR Trophy |
I have a 632 with profiler 174X heads and sniper manifold (cnc ported from profiler) running on methanol with 1450 single carb. 14.8:1 compression .890 lift before lash, shifting at 7500. It's in a chassis door car runs high 4.90's to mid 5.0's @ 138ish depending on the weather. How much gain if any would you expect from porting these? I have also considered going to a tunnel ram if that would help. If I can't pick up a solid .15 then I may put a small shot on it. I've just never been a nitrous guy. I've been down the head and intake porting road before on another set of heads. In that case I did nothing for ET but this is a different engine setup and different head/intake combo.This message has been edited. Last edited by: inferno camaro, | ||
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| DRR Top Comp |
A Bo Laws carb is worth a little. A 1.69 and a 5.13 gear is worth a little in the middle around the shift. I only been telling ya that 5 years.  | |||
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DRR S/Pro |
I run the Profiler 174x heads and they flow really well out of the box, IMO any port work to them or manifold will be a waste of money and will not gain much of anything. To pick up .150-.200 in a fast door car like you have is going to have to come from some sort of boost | |||
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| DRR Top Comp |
It's fast everywhere but in the middle. That costs momentum, mph. Ya might be able to kick it in the azz a lil harder out of the gate less efficient converter in low gear -1.69 too. It'll definitely carry momentum better at the shift.This message has been edited. Last edited by: Mike Rietow, | |||
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| DRR Trophy |
Yes you have. I don't think I have the rpm to go 5.13 Running 4.86 now crossing at 7450 around 9 % slip. That is as hard as I want to twist it.
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| DRR Trophy |
This is what I'm thinking too.
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| DRR Top Comp |
7700 140 mph | |||
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| DRR Trophy |
And you don’t think you’re going to twist it harder with spray | |||
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DRR Trophy |
IMO, those heads are very good for what they are (24º) ….for gasoline. I would consider a fuel change first, especially since you are running naturally aspirated on alcohol. I would think one tenth there and possibly a cam change (you didn’t mention what you had) for a few more little numbers and then look for a place to get some weight out if possible. If your only looking for .15, that’s an easy job for the NOS and it wouldn’t be much of a threat to anything…..but most defiantly go to gas first….. Jerry Kathe | |||
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| DRR Sportsman |
Despite making more horsepower on the dyno with alcohol, we ran roughly .05 quicker by switching to gas on our 632 head hunter motor. Most likely to pick up any more it’s going to require weight and or nitrous. | |||
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| DRR Elite |
As I told you and dad you would  Deja vue, the OP wasn’t happy with his last engine and wanted more power while refusing to run gas, that’s why he got this engine and now it isn’t good enough.  That said, the OP’s engine was built by Phil Oakley, that’s he should be asking, not seeking opinions here. My opinion is he ain’t going to find a Tenth and a half with this combo without spending thousands and countless hours swapping parts and testing. Time to sell this one and start over.This message has been edited. Last edited by: 1320racer, | |||
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| DRR Sportsman |
Not afraid to admit you were right on that Ed. PAR also told us it would pick up on gas despite dyno numbers on his dyno Not sure if the OP has an aluminum block or not. If no aluminum block then that along with switching to gas is probably worth a solid tenth or a tad more As far as porting goes. After porting heads/intake I have seen no gain to potentially 0.02 in gain. The 0.02 in gain may have just been more in my head to make me feel better about the situationThis message has been edited. Last edited by: racerdude2054, | |||
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| DRR Elite |
I've stated here many times that if your heads are sized correctly for your engine, porting them and your intake is a waste of $$ no matters who is doing the work. Been there, spent the money and also saw no improvement...ZERO! | |||
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| DRR Trophy |
Other question is are you trying to pick up .015 or .15 big difference you’re post says .015 you state both | |||
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| DRR Top Comp |
4.9x year round. Gasoline is faster, we saw that firsthand on a 23 434 I did for a Super Pro doorslammer that dipped in the 5.50's on gasoline. | |||
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| DRR Trophy |
My last engine was .10 faster on methanol than gas. I ran it in 114 gas, E85 and methanol and was quicker and faster on methanol. I would have built a 12* headed engine but they are too tall to fit under the hood. Looks like a small shot will be the solution.
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| DRR Trophy |
I think your car is a perfect candidate for a TBS 250 mini blower with the goal you have and have some room for more if desired. A little thicker head gasket and you should be able to run 2-4 psi and easily run 4.70-4.80’s. The 4.86 gear will have to be switched to a 4.30 gear. When we installed the 250 on dads car, he was adamant about it fitting under the hood. So we had to install a new scoop to clear everything. The biggest challenge was finding one long enough. The nose on his beretta slopes down so the hood itself would hit the front pulley. Your Camaro may not have that concern. | |||
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| DRR Trophy |
I do have an aluminum block.
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| DRR Trophy |
.15, must have fat fingered it.
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| DRR Elite |
it wasn't, you just think it was because your testing was invalid, no weather data, no control car in the other lane. | |||
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