bench racing time what will it make

[wideopen231]

Building 526 TFX Hemi for my FED.Have been playing with desktop dyno.Normally its pretty dang close given correct info. Seems its estimates are high this time for what I would expect. So lets get a few guess as to what yout think out put would be.

 4.310 bore
 4.500 crank
 7.196 rods
 13:1  compression total seal low drag rings
 BAE heads fuel style 2.375/2.00
stage 5 roller rockers
 Sheetmetal intake w/
 enderle injection
 mag 12
282/278@.050  116cL .800 lift roller cam

 give it a shot  winner gets high 5 by the way.Down side will not know for sure real answer for while but maybe idea if I am off or program is off. Heck hopefully me.

[wideopen231]

go a head and make a SWAG guys.Not like your going to be called to front of room if wrong,heck no wrong here since true answer is not known yet.

[Pipe Dreams]

   I'll play along. Say........ 950ish.

[wideopen231]

well pipe dreams I will say you are closer to what I am thinking than what computer program says Hopefully we are both wrong when its actual dyno time.

[masracingtd1167]

Chris I don't know too much about those Hemi heads . Do you think that 2.0 hp per cube is reasonable ? My sons 572 big block with Big Chief heads is around 1000 hp.Most of the comp stuff is up around 2.9 today .

[wideopen231]

Hemi have high flow numbers compared to BBC stuff and air is king when making power,.example AJPE2 heads will flow 152@ 200,214@300,295@400,364@500.440@.600,494@700,519@.800 and534@900.Ok my motr will not need that last number.Thats intak with 2.400 valve. I was told by three different dyno guys they use 2.2 to 2.4 times flow to give them idea of what to expect from a motor. They all swear its always been real close. Given that  the computer on my 526 is closer than what I would figure.

Bill ,
For grinns and giggles if you have info on your sons motor I would like to run it thru desktop dyno and see how close it comes. Bore,stroke compression,induction style and flow,cam specs o/c Intake and exhaust and most important flow numbers for heads.  Stan Wiess has web site giving flow rates of lots of heads if you do not have yours.Yours would be more accurate as they never flow exactly the same. I have run lots of combo's with all the right input it gives me a number + or - 3%. most of the time. I am actually amzed that anyone can right a program that works this well with 100,000's of changes that can be made.

  Same offer for anyone else that what to try it.If you have real world number to check agains it would be awsome if not then its just fun.

[Pipe Dreams]

I' m couriousas to what the programs will sa y about my combo
415 ci small block mopar on alcohol
4.070 bore
4.00  stroke
6.123 rod length
12.8/1 compression
2.10 intake
1.60 exhaust
Heads as cast max  flow  278.8 /182.9 @ .550
                                              277.5/ 185.5@ .600
Dual enderle toilets on a Mopar M1 Tunnel Ram
 Mopar Perf. .590 Flat Tappet Cam 265* duration@ 50,106 lobe seperation


My gestimation is some where in the 650 to 700 range. What do you think?

[wideopen231]

need all of following info
 Bore
 stroke
 compression
rod length
 head flow at .200,.300,.400,.500,.600 and .700 ,more if cam bigger
 intake and exhaust valve size
 cam I need open and close numbers IO/IC  and E/O E/C and lift
 intake type
 if carb size
 exhaust style
 I will run with info you gave and try to find a cam close and see if I have any heads of file simular.

[wideopen231]

Using your info and a cam thats close but off cpl degrees(110) on lobe seperation and guessing 2 toilets has to be good for 2100 cfm,heads 263/193 cfm at .600 lift I came up with 630 hp at 6500 rpm and563 tq at 5000 rpm Now with exact cam and head info I can get closer,well program can. changing flow on toilet did almost nothing so I would guess 2100 is more than enough for engine.

[Pipe Dreams]

Thanks for the info. I guess I wasn't that far off then thinking 650 then. We' ll have to see what it does after I  port the heads and put in my new cam.

[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