kingsey

Street car...people are split between them 50/50

224R on a 112 lsa

Looking for best power for the street

mchdg86

iTrader: (3)

I like my 5.3 heads. Put me at 400 rwhp with a locked stalled auto.

kingsey

Lots of views. Any more people care to share?

TransAmcoupe98

iTrader: (10)

5.3 heads dumdumdum

Midnight02

iTrader: (8)

Just had to make this decision myself....I went with the 5.3 heads because I'm building a street car and wanted to keep the head swap on a bit of a budget. If my car was a track car and I was looking for the ABSOLUTE best performance out of the stock cubed LS1, I would've went with the AFR 205's or the TFS 215's (5.7 castings).

99blancoSS

iTrader: (115)

I had the 5.3's and always saw more power being out down with ls6's. I'd opt for the MTI's on sale right now.

-Joseph-

iTrader: (12)

I recently installed a set of PRC CNC 5.3L 2.5 heads and a 228R|114lsa on a 98 Camaro with a LS6 Intake, TCI 3500 converter and Pacesetters. This was for one of my brothers coworkers at his workplace. It picked up approximately 90rwhp through a stalled automatic.

Before the heads and cam the car was running consistent 12.7-12.8's in 4500-5000DA of air. After the H/C install and tuning the car immediately went to running 11.7 @ 116mph with the same air. I drove this car around for a week before I delivered it and it was one of the nicest driving F-body setups I've ever driven. You could barely tell it was modded during regular commute type driving.

BIG_MIKE2005

iTrader: (116)

I absolutely love my 5.3 & 224 combo. And like stated above for a street machine this is your combo. It will make more torque down low which is what you want on the street. And it'll bump up your compression a little too, which helps out.

Sales2@Texas-speed

iTrader: (5)

Also remember, our heads are on special as well I agree that the 5.3L heads would be a great addition to your vehicle currently. The slight boost in compression along with THE shortest CNC'd 5.3L intake runner available today make for a fun street/strip cruiser!

danf1000

iTrader: (2)

5.3 for torque street fighter combination.

VIPERBLUELX

iTrader: (2)

why the small cam?

camaroIroc

iTrader: (1)

I got a question, Im new to this site and I am hoping someone can help me.

I have a 5.3 LM7 (1999), and I want to run this stock LS2 cam (.500in, .500exh, @.050 dur)..does anyone know what type of valve springs I may need, or if anyone has ran this application? Im also runnin an LS2 intake.

thanks in advance.

BIG_MIKE2005

iTrader: (116)

Why not?? These 224 cams have carried many full weight street cars into the 11's just fine. You don't need a big cam to turn a good ET. Peak power doesn't mean anything to me. I'd much rather see a smooth power/torque curve climbing all the way to my shift point. These cams do exactly that.

eamador11

zman1969

iTrader: (91)

why would you recomend them? they are double what Tx Speed gets for their awsome looking 5.3's ? I really dont see the value in that. seems like the question posed was budget minded - bang for the buck

BIG_MIKE2005

iTrader: (116)

It's also about you goals. The LS6 casting will flow higher at higher RPM's, but the 5.3 will bump your compression & make more torque.

If you like dyno numbers & spend most your cars life on the track, then the 243 cast heads are the route to go. But if your a every now & again track car while the rest of the time it's street driven then 5.3's are the better route.

jmmullin

iTrader: (2)

I'd say 5.3's; its what I have and my cam is 232/234...

That cam, being a pretty mild one, has some smaller lift #s...Probably wouldn't be very beneficial to go with the better-flowing ls6 castings...the bigger compression from the 5.3's would outweigh the better flow from the LS6 heads in my opinion, though I would think the difference would only be about 10 rwhp... LS6 heads are slightly more expensive I believe.

radkon

iTrader: (2)

The real question is if you were to mill the LS6 heads for the same compression ratio which heads would you choose?

JZ28

iTrader: (3)

I can tell you exactly how that combo works. I have the 224 112LSA cam with TSP 5.3 heads. I had the heads milled a little extra for ~11.25 compression. On the dyno it put down 415rwhp/402rwt, those are SAE corrected #'s. Torque is the best part. Makes over 300 lb/ft at the wheels from 2k all the way through redline. Makes over 350 from 3k-6k. GREAT street setup. My car is a 6-speed by the way.

kingsey

So if i go to the 5.3's i have to replace my brand new pushrods?


I was tossing around the idea of just going with stock ls6 zo6 heads if they would get me auther 20rwhp compaired to 35 for anuther 700 bucks


Or am i thinking like a moron about the stock ls6 heads?