CyaPussy

iTrader: (1)

Which block and cubic inches without over spinning the d1sc is going to give me the best et in your opinion please explain i need as much help as possible.

conan

iTrader: (5)

You could feed a 39x ci ls1 or a 402 ls2 with a D1, My vote would be the 402/ls2. There are a few guys on here in the 9's with bigger ci and a D1.

https://ls1tech.com/forums/forced-in...arger-lol.html

https://ls1tech.com/forums/forced-in...et-139mph.html

CyaPussy

iTrader: (1)

Anyone else? I just dont want to go with a 402 and over spin the d1sc.

venom ws7

iTrader: (13)

anything from 346 to under 400ci search Trust's threads he made over 800rwhp with 396ci Auto 12bolt car
with 400+ci you can get over 700rwhp with less boost though...

glennd

I have a 416" LS3 using a D1sc with single intercooler. I am getting 15.5 lbs using a 3.75" pulley and a 7.25" balancer. This is 53000 rpm @ 6600 engine rpm, blower max rating is 62000 rpm. 858 rwhp 780rwtq

1CAMWNDR

iTrader: (21)

Damn, that is not bad at all. I wonder how that would hold up on a 427" LS3/LQ9 (4.07" bore 4.100" stroke)?

ironhorse583

iTrader: (5)

whats ur compression??

EPP

iTrader: (22)

I'd say a 347 with a 4.0 stoker crank - 382/383

Anything larger makes the 'lil D-1SC work so hard the inlet air temps tend to run hotter. Bob

glennd

Compression is 9.2:1 AFR 225 heads fast 90/90 all were ported by Tony Mamo @AFR. Meth, KookS 1 7/8" stock titainium C5 mufflers. Bore 4.065" stroke 4.00"
416"

1CAMWNDR

iTrader: (21)

So if I ever want to strap a blower to my iron 427 and put 15psi to it I should probably only consider an F1C or F1A.

fatmat80

might be a few to many cubes for the little d1..but you dont have to spin blower as much to make big power so u might be ok..

CyaPussy

iTrader: (1)

I understand u can make 700 hp with a 402 and lower boost but would a 347 or 383 run a better et with close to the same power.

dlandsvZ28

You see forged 347's, and forged 370's, and some forged 383's but never forged LS2 -364's with stock crank or forged LS3 376's with stock crank with D1.

Most seem inclined to want to go to 402 or 408 with a D1 instead of just forged pistons leaving the crank stock.

Why not a forged 364 or 376?

CyaPussy

iTrader: (1)

That was my exact thought i would think a non stroker motor would rev faster but i could be wrong. What is the benifit of a stroker motor with boost?

EPP

iTrader: (22)

http://www.exoticperformanceplus.com...Car.php?car=42
Check out the above T/A. We managed to get 16 psi out of the D-1SC on the 402, but it was overworking the blower.

http://www.exoticperformanceplus.com...Car.php?car=12
Check out my Camaro in the above link. We managed to get 19 psi out of the F-1A with my 408, it was maxed out as well.

http://www.exoticperformanceplus.com...Car.php?car=51
Check out the above '08 Z06, where we built a Warhawk 427 and installed an F-1C, then we swapped the F-1C out for an F-1R. We then got 19 psi out of it. This engine had heads and an intake that flowed too well, this engine needed an F2 blower.

To answer your question, on a 427 I'd go with an F-1C or an F-1R. Bob

EPP

iTrader: (22)

If memory serves me, KP had an LS2 engine built for his previous T/A, where he kept the stock crank. The car ran in the 8's in the 1/4.

More torque. Bob

Pro Stock John

iTrader: (34)

So somewhere between a 346 - 370 cid engine Bob? I was wondering about this too. How are the D1SC's about belt slippage these days, pretty good?

BIG_MIKE2005

iTrader: (116)

Check out ChevyChad's recent thread about adding another pulley to a machined standoff w/standard j-bracket. That along with the 8-rib set-up should make it difficult to get belt slip.

https://ls1tech.com/forums/forced-in...rap-fbody.html

dlandsvZ28

Instead of a forged iron block 370 I'm going with either a stock long block LS2 (second choice) with forged pistons only or stock long block LS3 (first choice) with forged pistons.

These motors make so some much power and torque anyway at 10- 15 lbs of boost that I never did agree with the argument that you need a 402 or 408 for the street because of more torque. The LS3 is torquey enough for me and car will be all street - no drag.

My current setup is HC stock bottom end 347 with 8rib D1SC with a 4.38 pulley. On a very safe tune makes 565 rwhp on a Mustang Dnyo. So a forged pistons only LS3 376 should do me just fine as it won't be a drag car (1998 Z28).

dlandsvZ28

Chevy Chad or Bob at EPP.

How about a kit we can buy and bolt on for us that don't have access to CNC machinists?

I like the idea of a machined standoff bolt and pulley and longer belt much better than the SDCE setup selling for over $700.