pdbq

iTrader: (7)

I've been planning another build for my Camaro as soon as I can get some more money together and increase my cash flow as it sits currently. Lately, I've been all about "sleepers motors" without power adders, appearing stock, sounding stock, yet high performance oriented. The Gen 3 motors do seem to have a lot more potential than their venerable SBC parents. So that is why I choose to build something as crazy as this...

Well, for the past few weeks, I've thought about building something a 402 cubic inch LSX based stroker that doesn't have to idle above 600 rpm, nor rev past 6000 rpms. I'd love a cam that would make the motor sound "stock" and run low bottom 11s in an automatic without having to use a rear gear ratio higher than 3.42.

Of course, this motor will have to get respectable fuel mileage as a daily driven car as well as great street manners without telling others, "Hey! I'm cammed!" I've been seeing some of those TSP ported 5.3L heads flow crazy numbers (320 cfm @ .600 lift @ 28" of water) without even having to resort to a pair of high dollar AFR heads. Sounds very good for power! I've thought about getting a custom ground cam similar to the CheaTR cam, but suited towards larger displacement motors. Something like a wide split 218/236 duration, .595/.605 lift @ .050 on a 117 LSA. So please help me critique this build. Thanks!

shaolink9

WHy not use the l92 heads ?

98Aggie

iTrader: (19)

https://ls1tech.com/forums/dynamomet...k-results.html

pdbq

iTrader: (7)

Dayum........... if a stock displacement 346 can do 430 rwhp through an auto, then my future 402 cube setup better do at least 500 rwhp with stock 3.23s and a 2400 stall. That's some awesome power for such a small cam. The internet has always told me that numbers like that aren't possible with such a small cam with an automatic to boot. The 372 cube motor with the MS3 cam I'm building for my Vette better do at least 530 rwhp through an auto. You'll definitely be able to tell that it is cammed... that's fo sho... XD

lemons12

iTrader: (71)

There is a major difference between internet numbers and real world numbers.

chrs1313

iTrader: (24)

when i was Stock Internal and still had exhaust manifolds and cats on the car i went 11.72 at 115 with some good air, now if i were to do a sleeper car i would have kept it the same and put a nice cheatr cam in and gained around 3mph...then added a hidden shot...mid to high 10s with manifolds and stock sounding idle...also was at 3365 lbs

Patrick G

iTrader: (14)

The key to a successful sleeper build is to get the best performing cylinder heads you can afford (notice I didn't say best flowing). Once you have really good heads, you can go easy with the cam timing and make lots of power.

L92 heads work great on the larger bore, longer stroke applications if you're on a budget. If you have the bucks, the an LS7 or larger AFR/TFS/PI/PRC cathedral port head will really kick butt with a mild cam. An LS7 head with a 220 at .050" cam will make monster power down low and still have enough airflow to carry up high. Just need a big bore motor for them to work.

transamfreak01

iTrader: (8)

yup jus what patrick g said. if your looking for something that seems stock then the heads is where u have to spend the money. maybe look at tony mamos afr and FAST ported set up. with that u should make lots of power even on a mild cam. what are u trying to run with this set up or what are ur goals besides being a "sleeper?"

pdbq

iTrader: (7)

I'd love for this set up to run low to mid 11s with n/a, get high teens fuel economy in the city, high 20s on the freeway, and be low maintenance, i.e. not having to change valve springs every 30k miles. I just really want an everyday driver with no hassles that is able to compete with the $100k exotics who might be looking to have some fun with an unexpectedly fast Camaro that sounds stock.

transamfreak01

iTrader: (8)

well how much do u have to spend? and are u doing the work urself? like said above i would go with some name brand heads like an AFR and FAST set up and that will definitly get u to ur goal as long as everything is dialed in CORRECTLY... for that ur lookin at around 4k and then id throw in a 220/224 camshaft.