mchicia1

iTrader: (5)

Anyone with 1/4 mile times or dyno #'s?

Hard to find anyone with heads cam but no long tubes, so it's hard comparing my setup to anyones. Just not sure if my car is slow or right where it should be and want something to compare it to.

Mavn

iTrader: (3)

It would help if you put cam specs/head specs/intake/exaust youre running lol and what your 1/4 time is.

2000PewterT/A

https://ls1tech.com/forums/drag-racing-results-85/ Post here if your looking for 1/4 and 1/8 mile times.

LSM3

iTrader: (1)

70k LS1
Stock 799s
TSP 228r
Ls6 Intake
Tune
Shorties
370whp

maxpower_454

iTrader: (7)

Who would do all the work for H/C and then not put long tubes on?!?!?

thunderstruck507

iTrader: (18)

If it's a manual trans car on the typical dynojet it looks like you're down 30-40rwhp...about what I would expect a car to lose without longtubes

If it's an automatic you're doing better than I would expect.

mchicia1

iTrader: (5)

I had a max effort h/c/i/e setup before this then I popped #7. Put in a forged 347 for boost and put on an ls3 top end, but I sold my catless headers because I couldn't bear the smell anymore and I went to an LS7 manifold + 3" exhaust setup. Someone on the vette forum did this exact swap from headers and only lost .4 rwhp in their boosted car, so it seems like headers won't matter as much on a boosted car. I am still N/A at the moment, but that will change.



It put down 385 with the smaller 224/230 cam, but that was through broken 4.10s..they were dragging the car down. I would estimate it was losing at least 20 rwhp on the dyno.

I was ETing 12.4 and trapping around 119 at the track, but I still haven't gotten a clean run in yet, so that could very well be low 12s at over 120 if I can get it out of the hole.

There is no way swapping to long tubes will gain me 40 rwhp. Stock LS7 guys only gain 5-10 rwhp when they swap. With a cam, much more, but a cammed 427 is a bit different than a cammed 347. Much of the gain with long tubes is from swapping the factory midpipe out. I am running dual 3" all the way to the tailpipe. I am sure headers are better, but it's not like this is even remotely close to a stock, factory manifold setup.

I would say it would gain me 10 peak and 15-20 through the curve, but no way 30-40.

mchicia1

iTrader: (5)

I made the thread to see what others were running, not to show what I was..but here you go anyway.

Forged 347 - 10.4: 1 compression
LS3 heads, milled .030" with .040" gasket, no porting.
LS3 intake manifold - BER ported
LS2 Throttle body
Vararam intake
LS7 Catted exhaust manifolds - 3" mids all the way to the bumper
231/239 .605 .605 115+4 cam (swapping to an Ed Curtis custom soon, which is dramatically different)

I run on street tires
Best 60' 2.18
Best ET: 12.4
Best MPH 118.8

My goal is 11's on street tires. Getting even a 2.0 60' should get me very close, I just haven't figured out the launching with an ls7 clutch yet. I like running in street trim, since that is how I run it on the street. I am well aware I can put radials on and run easy 11's. I think my biggest issue is the cam is too big for the heads, which is why I contacted Ed Curtis. The car will not move out of the hole at all. I let out the clutch at the track at 3100 and it bogged lol.

I noticed the car got noticeably slower after swapping to this cam from a 224/230 cam. I never had track times with the old cam, but I could tell right away it was missing about 30 ft/lbs below 4500.

My old setup ran 11.7 @ 125 on street tires with a 2.0 60'. Damn I miss that setup lol. But I got these grand aspirations to go boost and forge my motor. I should have just done a stock rebuild and put the same **** right back on. Oh well.

maxpower_454

iTrader: (7)

[QUOTE=mchicia1;17722439]I had a max effort h/c/i/e setup before this then I popped #7. Put in a forged 347 for boost and put on an ls3 top end, but I sold my catless headers because I couldn't bear the smell anymore and I went to an LS7 manifold + 3" exhaust setup. Someone on the vette forum did this exact swap from headers and only lost .4 rwhp in their boosted car, so it seems like headers won't matter as much on a boosted car. I am still N/A at the moment, but that will change.


If that's the case there should be no difference between your setup and LT's. Boost or N/A shouldn't matter for exhaust. Flow is flow. Actually a boosted engine will be flowing more exhaust than N/A since it's making more power so you should see more of a restriction with boost.

mchicia1

iTrader: (5)

[QUOTE=maxpower_454;17722721]I think he did lose some torque in the mid range, like 15 ft/lbs, which is what I would expect since that is where headers shine.