SStroked 410

I see these sponsors making crazy power out of 346's as if they were strokers. So what can I change or do to make some crazy power out of my stroker? I think I am set for exhaust.... Kooks 1 7/8" race headers with dual cut outs

am I missing just the FAST 90mm TB intake and EWP? I am going with either A.S or GTP stage 3 LS6 heads with 2.08 1.60 valves and the cam in my sig......anyone have any sugestions?

LOnSLO

iTrader: (15)

The problem is, headflow can't keep up with increasing cubes. We need a set of Brodix 14 degree heads.

Vents

iTrader: (9)

lol.. just get on the c5r bandwagon. i've seen that 390ci+ motors need more heads than the standard LSX series head to make good power. all the strokers seem to choke if there's not a GOOD set of heads involved. take ARE's shop car (since it's really the only one dynoed i can think of) they're 422 made some sickly hp and Tq because it has some worked C5R's

JF WS6

So, based on these comments..... could it be said that beyond a certain displacement you will see very minimal returns? At what CID does everyone think that is (assuming a worked stage III LS6/LQ9 head?) I'm anxious for someone to put a stage III pair of the modified AFR heads on a super stroker and see how they do once they are released.

Jimmy98Z

If you have the money go with some C5R head's they are the best.
jimmy

SStroked 410

lol
I dont have the money for C5R heads

Cricket99SS

I'm hoping we see some big numbers out of the 225 cc AFR heads that will wake up a lot of this big motors here. I hope an LSX/90mm intake with some hogged out AFRs on top might be good enough for some mid 500s out of these things. I guess time will tell, and it looks like April or so before the big AFRs hit the market.

Vents

iTrader: (9)

JF,

i actually typed a number to start with but i dont know how accurate my deductions would be, since it's just a shot in the dark. i'd think it would be safe to say that once you cross the 380-396CI range, you would be at the base of C5r territory. now, thats not to say that 422 ci setups arent making good power w/ some 330 cfm LS6/LQ9 heads, but based off of other c5r headed motors i've seen of similar CI, i think there is plenty more power to be had, with more head flow.

specific 387 Ci all bore motors come to mind making 500+ RWHP w/ 340 cfm LQ9 heads,

it would seem that 380 CFM or more would be ideal conditions for a 420+ ci motor to live under. you could expect close to 600 RW if not more. im sure that some of the FI folks could chime in here and extrapolate on this matter a tad bit better than i could. i think there's a formulia for CFM to HP somewhere.

i think this would be a great experiment for someone to conduct that has nothing better to do with their time. CI VS head flow = XX amount of HP potential.

JF WS6

I think your deductions sound about right.... I also have seen the results from a couple of the all bore motors over 500RWHP, but with very high flowing LQ9 heads in the 330+cfm range. Probably going to be awhile unfortunately before we see anything available in the aftermarket that is reasonably priced that could produce 380cfm.

Building a 420+ CID stroker just doesn't seem worth the expense at the present time considering the outputs of some of the allbores or even some of these stock displacement motors.

Worm

iTrader: (2)

With the 410 I think you should be shooting for a torque number, not a hp number.

Pro Stock John

iTrader: (34)

I think the LS1 responds to upgrades and going from 300 rwhp to 400rwhp or more with boltons is very achievable. But going from 400rwhp to 550rwhp in a stroker is harder because the gains become harder and harder to get above 500rwhp.

I made 475rwhp/505rwtq with an ARE 422ci iron block a few years ago, and it was probably about 500rwhp if I dynoed on radials and had a stock rearend in there. For me to find another 50rwhp from there would have meant a Meziere water pump, more work on my LS6 heads, and more camshaft. I was more like 11.75:1 too.

SStroked 410

I am not to worried about torque... lots of torque will come when I hit the nitrous


Well I am not going to waste my money on the Meziere or fast intake I will just try to make the best of what I have.

JZ'sTA

iTrader: (23)

This is very interesting to me as well as I have a 410 CI motor with 2001 LS1 heads that flowed 314@600.
My compression is 11.85:1 with these heads and that is why I didn't use a different head that produces better results.
I would like to see some high HP numbers from this motor however if my heads aren't good enough then I will acturally make less power then a couple heads and cam cars.

Makes me wonder why I spent so much money on a bottom end.
Then I realize the torque this puppy should make and I remember why I spent the $$$.

Those that are running 500 HP H/C cars are doing low to mid 400's torque. Then stick a 410 in the same car with the same quality heads and cam and you might not see a big HP gain but will see AT LEAST 50 more ft pounds of torque.

I hope that the fast intake and 90mm TB will help the big cube class make more power it sure has helped on the H/C cars. Also need to remember that cartek and LG the 2 H/C cars I have read making 500+ already had a 90mm and LSX intake.
I will be ordering mine soon.

bspz28

iTrader: (1)

The cartek car that made 501 hp was done with the TPIS intake and throttle body. I also have the same set-up on my car and made 491 hp through a Moser 9" with 4.10 gears. Cartek will be trying the F.A.S.T intake real soon to see what gains they get from it ..

Terry Burger

iTrader: (4)

A 100 shot..

SStroked 410

I am hoping with my set up I will make atleast 610-620rwhp with a 100 shot

Linear Velocity

iTrader: (1)

That'd be pretty hard to do with that low of compression. I'd say maybe with a big solid roller, custom intake, and some bigger headers (maybe 1 7/8 to 2) you'd probably do around 520-530rwhp, higher compression plays a big factor in getting HP out of these motors.

SStroked 410

I would go with a higher compression but here in California I can only run 91 at the pump and race gas on the spray

I am not talking about making 550rwhp through a cat back. I have Kooks race 1 7/8"-3" going to a QTP dual electric cutout y-pipe which will usually give about 10-20rwhp depending on how free flowing the car back is. I hoping for 530rwhp with the cutouts open with a six speed and a stock rear end
we'll see what happens hoping for next month to dyno/tune

VINCE

iTrader: (1)

530rwhp would be awesome NA..

Mike K.

Vince I bet you make over 500 hp with your setup. What heads did you decide on?