Boostedbrick

Car is 3000lbs, sbe 4.8 turbo,th400, Circle d 2500 stall, 7875 on3, ls9 cam currently 327 rear gear. Car pulls super hard on the top end and is little doggy down low, question is would a 228 /228 .575 /.575, 112 "turbo" cam hurt this setup in regards to traction, or top end? Just looking for a little more low to mid range transient torque that this ls9 cam just doesn't seem to have. Reason I ask is because a local guy is wanting to sell for a good price but it just seems to big of a cam for this setup and need opinions ...

MY_2K_Z

iTrader: (1)

That converter is really hurting you. It's to tight for a little 4.8 that has no torque down low. I'd swap to like a 3500 and see how you feel.
I have a circle d triple disc 3000 stall but can push it up to 3900 and build 5 psi pretty quickly with my 6.0

svslow

Converter was my thought as well. The 228 cam would be the better option between the two, but they will both suffer on the low end with that tight of a converter.

truckdoug

iTrader: (25)

it seems every cam with that kind of duration split (211/230 @ .050) makes poor low end power.

also agree that converter is tight. maybe try some low viscosity hygard to get a another ~200rpm flash from it?

anyways i'd be looking at cams like the triple 12 cam or a the small LJMS cam for that set up

Boostedbrick

Correct, the converter is a little tight. The owner of the car I don't think is going to wanna change it unfortunetly, maybe over the winter. This is RMVB th400 with a brake launching at 2800rpm it cut a 1.8 60ft but is obviously slower to spool, if it builds too much boost or the brake is set too high it just blows the tires off. It was hus first time out at the track so now were go8ng iver what needs to be done, car was trapping 7.66 at 98 in 1/8th with the terrible 60 ft times..just didn't know if a cam would help in a positive way to help get it going quicker in 1st. Top end pull is superb

JoeNova

https://www.summitracing.com/parts/h...make/chevrolet

Boostedbrick

So pass on the cam? Guy wants $150 for it, I think it would help wake it up a little with the tighter lsa no?

roastin240

iTrader: (13)

If its in good shape then I wouldnt pass it up for $150. Give me his phone number if you decide to though

SethU

Just my opinion, but I think the 228 will not improve the bottom end. It will improve the top end though. A 4.8 on that cam will likely be shifting in the 7500 RPM range, which is fine if the car is set up for it (Converter). If you're wanting to deal with the converter you have, I'd personally be shopping for something with about the same intake duration as the LS9, something in the 212 intake duration neighborhood.

Take a look at this cam comparison article and see what you think.
http://www.hotrod.com/articles/ls-cam-test-comparison/

Boostedbrick

I think we're gonna get the cam anyways because of the price, he's planning on s475 in near future so this cam would probably do really well with that. He's willing to restall converter in the winter so that should help. Thanks for the suggestions.

SethU

Even if you didn't use it for this engine, the price is fair enough to put it on the shelf for another... for sure

Good luck with it

Boostedbrick

[QUOTE=SethU;19605515]Even if you didn't use it for this engine, the price is fair enough to put it on the shelf for another... for sure

Good luck

Yep, my thinking exactly. Its fun to expirement as well.