Technical > Matt Shaff's Engine Shop
bench racing time what will it make
Pipe Dreams:
Heck, guess I could give you the numbers now, have the flow number for the cnc porting for heads just like mine and the cam card for the new cam. After porting head flow is 157@.200,217@.300,263@.400,304@.500,322@.600,333@.650,334@.700
New cam is still a flat tappet and number are 106 lobe seperation, installed 103
With 1.5 rockers .637 lift intake .643 exhaust
1.6 rockers( which I've also been considering) . 680 intake .686 exhaust
Duration@ 50 282 degrees intake 287 exhaust
Intake open 38 BTC closes 64ABC
Exhaust opens 75.5 BBC closes 34.5 ATC
Think I also remember my dual toilets flow 3400 cfm.Once again thanks for running the numbers for me. Love having a better idea of how much HP the old girl is making.
Pipe Dreams:
Dang, forgot exhaust flow... 110@.200, 158@.300,203.6@.400,223@.500,230.5@600,237.4@.650 and241.1 @.700
P607:
Wideopen, I ran a similar combo two years ago before changing cars and engine combo, here's what it was......
607" KB solid aluminum block .500" tall deck, BAE fuel heads 2.375/2.000, 4.75" stroke, 4.510 bore, 7.550 BME rods, 290/286 @.050, .800/.785 lift 112 LS, pro mag 20, 5 stage dry sump oiling with star vacuum pump (18" vacuum), buzzard hat with adapter for KB manifold (your fab intake WILL be better), 1575lb Tuttle FED, 1.69 first gear glide, 3.89 rear gear, 14.0/33 tire, A-1 9" converter, shifted @7800, trapped around 8-8200, these were some older pieces a friend of mine and I thought we would "try", the engine had some untapped potential if I had stuck with it. It was easy on parts and very low maintenance. Ran a best of 7.19 @ 191 @ 3100 DA. With persistent tuning and a few parts changes it would have been a 6 second ride no problem. Hope I could give some insight to your build and best of luck!
Jeff S
wideopen231:
Close combo except that extra 80 CI! Agree about intake I have run the blower manifold with adapter and d ported bird catcher. I have another intake on the drawing borad so to speak that actually has intake shot straighter with a stagger runner design where #2 is on left and #1 on right where they cross and have small open section between them. Easier to build than describe it seems. I want to start with this intake and get it dialed in then put new design on for comparision. I know the cam I have is touch on big side and if program is correct I can gain about 60 HP with one that in 282@ 50 area instead of the 296- 500 crane blown alky cam I have. Would love to have a 600 ci combo but the 2 526 I have are sitting here and no cost,well now anyway. Would alos like to get newer heads again no cost for these. I am hoping to get into 6.70's after tuned out. !575 is close to weight I have figured for car w/driver. About same tire and going with 4.11 for now same 1.69 low,converter still working on that starting in 6400 to 6600 stall and work from there. 3.89 was first choice on gear but bought 2 4.11's on great deal,so xxxx figure give it a shot.
One thing nobody can say is that I am scared to experiment with combo,not popular with bracket guys.Maybe because I have been away since 1988,but I'm coming back.You can experiment and always bolt the old stuff back on.Don't have to be the fastest just the fastest with combo and engine size I am working with. Been the heads up WIDEOPEN deal and spent my inheritance and then some,Heck parents are not dead and I already spent it.Going to back down and play some,but going to be fast.
Question on converter. Did you get one specific for HEMI. Greg at FTI told me it would totaly different from Chevy due to torque and with extra 1/4 crank I figure you had more than I will. I know normally its a custom to the application things ,but also know somes we cheat and use something we have or get deal on.
wideopen231:
pipe dream,
good news with new numbers 741@ 7500 HP 593@5500 tq.500 + lbs tq from 4750 thru 7750 rpm
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