Head Suggestions for Lightweight LS2 402ci Stroker
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Head Suggestions for Lightweight LS2 402ci Stroker Okay. Here's my dilemma:
Putting a deposit down on a 402 shortblock.
It will consist ofan LS2 block, a machined down LS7 crank, LS7 titanium rods, and some custom lightweight pistons from JE.
The thing about the pistons is the valve reliefs have to match the valve angle of the head, so we technically have 3 choices here, maybe 4.
Stock 15* that would be CNC'd and worked by either Chris Frank @ Frankenstein or Darin Morgan @ Rehr Morrison. I have no flow #'s for either, but know they'll be top notch.
Trickflow 12* 255's 2.165 intake valve & 1.6 exhaust
FLOW DATA 4.060" BORE
Lift Intake Exhaust
0.100 71 59
0.200 140 117
0.300 225 168
0.400 288 213
0.500 331 236
0.550 348 241
0.600 361 247
0.700 373 254
* Tests conducted on a Superflow SF600 at 28" of water, 4.060" bore, 1.875" exh. pipe
Mast 11* 256's 2.165 intake valve & 1.6 exhaust
Flow Data w/4.000" Bore Plate
Lift Intake Exhaust
0.100 74 61
0.200 146 119
0.300 222 188
0.400 282 219
0.500 330 236
0.600 360 251
0.700 372 260
I sincerely welcome any thoughts and opinions. If I can fit it under a cowl hood, which I haven't figured out yet, they might be paired with a Holley mid rise or hi rise intake.
Car is a 2004 Corvette, M6 with Phadt 1 7/8" x 2.1" x 3" Tri Y Headers, No Cats, and a Corsa Sport (catback stays for the time being, might custom fab a true 3" corsa from a C6Z)
I believe the real limiting factor here will be if I go with a polymer intake or a cast type...
Putting a deposit down on a 402 shortblock.
It will consist ofan LS2 block, a machined down LS7 crank, LS7 titanium rods, and some custom lightweight pistons from JE.
The thing about the pistons is the valve reliefs have to match the valve angle of the head, so we technically have 3 choices here, maybe 4.
Stock 15* that would be CNC'd and worked by either Chris Frank @ Frankenstein or Darin Morgan @ Rehr Morrison. I have no flow #'s for either, but know they'll be top notch.
Trickflow 12* 255's 2.165 intake valve & 1.6 exhaust
FLOW DATA 4.060" BORE
Lift Intake Exhaust
0.100 71 59
0.200 140 117
0.300 225 168
0.400 288 213
0.500 331 236
0.550 348 241
0.600 361 247
0.700 373 254
* Tests conducted on a Superflow SF600 at 28" of water, 4.060" bore, 1.875" exh. pipe
Mast 11* 256's 2.165 intake valve & 1.6 exhaust
Flow Data w/4.000" Bore Plate
Lift Intake Exhaust
0.100 74 61
0.200 146 119
0.300 222 188
0.400 282 219
0.500 330 236
0.600 360 251
0.700 372 260
I sincerely welcome any thoughts and opinions. If I can fit it under a cowl hood, which I haven't figured out yet, they might be paired with a Holley mid rise or hi rise intake.
Car is a 2004 Corvette, M6 with Phadt 1 7/8" x 2.1" x 3" Tri Y Headers, No Cats, and a Corsa Sport (catback stays for the time being, might custom fab a true 3" corsa from a C6Z)
I believe the real limiting factor here will be if I go with a polymer intake or a cast type...
Banned
Joined: Mar 2013
Posts: 1,137
Likes: 2
From: Studewood/Acres-Homes TX.
I have both FLOW CHARTS and know both.. Just got FRANKS stage1 LS3 heads in today.. Sorry about drinkin and typin.. Work + i installed my own 4 ton A/c unit.. never went 2 sleep after i finished around 12 last night... I also got the TFS ls3 heads ...
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
I'm looking for "suggestions" and experienced opinions, not necessarily help.
Who's experienced either of the heads, what manifold they were running, and how the power was.
Flow #'s don't necessarily mean ****, but you need to have an idea of what it's doing so you can pick a cam.
So John, care to post said chart?
Who's experienced either of the heads, what manifold they were running, and how the power was.
Flow #'s don't necessarily mean ****, but you need to have an idea of what it's doing so you can pick a cam.
So John, care to post said chart?
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Verdad Gallardo Banned
Joined: Mar 2013
Posts: 1,137
Likes: 2
From: Studewood/Acres-Homes TX.
I do this cause i love ..this.....but take this ...I....I built and bought this and I will say this. nothing came 2 gether...DRO time...I got 700fwhp on a bad day 4 less than .....U ...how about you take a bet...
I NO WHAT I NO
Dr. I am also a Surgical Tech...
So we back 2 WHAT U WANNA SPEND ... A suggestion is your Budget...
I LUV U 2
I NO WHAT I NO
Dr. I am also a Surgical Tech...
So we back 2 WHAT U WANNA SPEND ... A suggestion is your Budget...
I LUV U 2
Last edited by lil john; Jul 13, 2014 at 12:16 AM.
I do this cause i love ..this.....but take this ...I....I built and bought this and I will say this. nothing came 2 gether...DRO time...I got 700fwhp on a bad day 4 less than .....U ...how about you take a bet...
I NO WHAT I NO
Dr. I am also a Surgical Tech...
So we back 2 WHAT U WANNA SPEND ... A suggestion is your Budget...
I LUV U 2
I NO WHAT I NO
Dr. I am also a Surgical Tech...
So we back 2 WHAT U WANNA SPEND ... A suggestion is your Budget...
I LUV U 2
Banned
Joined: Mar 2013
Posts: 1,137
Likes: 2
From: Studewood/Acres-Homes TX.
Name a # LS/BBC/SBC/BBF/SBF/....etc .....I may no something or have Spent on this B 4
We run FORZA 4 U THINK IT CAN'T HAPPEN IN REAL life... Check my resume... No Lies..
We run FORZA 4 U THINK IT CAN'T HAPPEN IN REAL life... Check my resume... No Lies..
Last edited by lil john; Jul 13, 2014 at 12:37 AM.
Banned
Joined: Mar 2013
Posts: 1,137
Likes: 2
From: Studewood/Acres-Homes TX.
& I will say this ......who is asking ??????
Y ask if don't want the answer.... FACT .. still rollin .
Look @ the avatar .... HULK is dead & ole spidey....
Any 1 can lose @ the track....
I like #s so U can try 2 figure out how 2 make it hook... My 700 fwhp IS NOT 4 DRAG ... just a g-body with hp & A/c ...
Y ask if don't want the answer.... FACT .. still rollin .
Look @ the avatar .... HULK is dead & ole spidey....
Any 1 can lose @ the track....
I like #s so U can try 2 figure out how 2 make it hook... My 700 fwhp IS NOT 4 DRAG ... just a g-body with hp & A/c ...
Last edited by lil john; Jul 13, 2014 at 01:59 AM.
Banned
Joined: Mar 2013
Posts: 1,137
Likes: 2
From: Studewood/Acres-Homes TX.
Sorry took it THE WRONG WAY ..look this up ...A few LS1TECH people spoke...
Frankenstein's NEWLY designed LS3 heads .. on Yellow bullet .....
D @ Reher heads say that 368 cfm @ .750 with a 264 cc port .....I got the #s
Sorry again...
XXX.
Frankenstein's NEWLY designed LS3 heads .. on Yellow bullet .....
D @ Reher heads say that 368 cfm @ .750 with a 264 cc port .....I got the #s
Sorry again...
XXX.
Last edited by lil john; Jul 13, 2014 at 04:47 AM.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
John, I appreciate the enthusiasm, and well, whatever else you're putting in here. I'm not quite sure what Forza 4 and surgical tech has to do with anything, but we'll just go with it for the time being. I will probably go back and edit some of your posts though.
I can honestly say if the car doesn't hit 540 I'll prob rip the motor right out and sell it.
I'm put max budget "around" 3k so AllPro isn't even in the question.
And I'll be honest, I'm not completely sold on a square port head. But I do wonder what the Mast "small bore" would do if the chamber were opened up for a 4.005" bore. 240cc would seem to me to give better port speed with a slightly smaller CSA.
No AFR's though. I want better than a 15* valve, but I'm curious to know what you put down, PaperMushrooms.
The cam will come from Ed Curtis.
I can honestly say if the car doesn't hit 540 I'll prob rip the motor right out and sell it.
I'm put max budget "around" 3k so AllPro isn't even in the question.
And I'll be honest, I'm not completely sold on a square port head. But I do wonder what the Mast "small bore" would do if the chamber were opened up for a 4.005" bore. 240cc would seem to me to give better port speed with a slightly smaller CSA.
No AFR's though. I want better than a 15* valve, but I'm curious to know what you put down, PaperMushrooms.
The cam will come from Ed Curtis.
Banned
Joined: Mar 2013
Posts: 1,137
Likes: 2
From: Studewood/Acres-Homes TX.
Sorry I party hard & Work even harder...... ARMY thing ...
Did you find the info 4 the flow chart on Yellow bullet.... LS3 bare heads U 2 cost 175... in 08... hell of a mark up... glad I got'em bac then.
The stage 1 get 388cfm
Stage 2 401 cfm
stage3 410 cfm.. 4 Franks heads... I liked that the stage 2 heads got 757hp with a solid roller set-up that was Very close 2 my set-up... I went with the stage1 heads as this is a STREET car...I know that I still got 700 just with some low - mid range TQ...
Did you find the info 4 the flow chart on Yellow bullet.... LS3 bare heads U 2 cost 175... in 08... hell of a mark up... glad I got'em bac then.
The stage 1 get 388cfm
Stage 2 401 cfm
stage3 410 cfm.. 4 Franks heads... I liked that the stage 2 heads got 757hp with a solid roller set-up that was Very close 2 my set-up... I went with the stage1 heads as this is a STREET car...I know that I still got 700 just with some low - mid range TQ...
Banned
Joined: Mar 2013
Posts: 1,137
Likes: 2
From: Studewood/Acres-Homes TX.
And the Mast... TFS ... will make more power .... But @ a cost...think about it...the Hot Rod 408 head test gave you the REAL diff. in heads & Hp.
Base LS3 heads are hard 2 beat for what they cost...I am looking Good with them...700 horses strong.
Base LS3 heads are hard 2 beat for what they cost...I am looking Good with them...700 horses strong.
Last edited by lil john; Jul 13, 2014 at 10:10 AM.
