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Predict RWHP for my project for fun
I ♥ Acer
Joined: Nov 2004
Posts: 1,913
From:
RE: Predict RWHP for my project for fun
ORIGINAL: angcobra
The build should be done in the next 4 weeks or so. I haven't built one since 1979. After a short "break in" I will tune it on the dyno and post the results.
Here's the build; If you need more specific info let me know.
Car -1988 GT
Dif - 373 positrac
trans - TKO
Engine - 347 stroker with girdle
Hawks Racing Forged Crank
SCAT forged H-style rods
Deck milled for correct heigth and compression
Trick Flow Forged pistons 9.1/1 compression
Custom fit of all pistons (.003) and file to fit rings with end gap .025
Main journals align honed after girdle install
All bearings and journals matched for clearance and elimination of taper.
All internals individually balance and then complete assembly balanced.
Comp cam .566/.570 lift, duration @ .050 232/236 lobe sep 114, and properly timed.
Rller tappets, roller rockers (1.6), and roller chain assembly
1/2" head studs
Trick flow heads with 2.02 and 1.60 valves, ported
Typhoon performance plus intake, gasket matched, phenolic spacer
42# Ford Racing injectors with matching MAF meter
Mallory Hifyre ignition
Paxton NOVI 1000 SC with 6# boost
BBK shorty headers
MAC off road H pipe
Prochamber catbacks
[IMG]local://upfiles/10436/F95842DB50694EC892AC98B65AEBF7DA.jpg[/IMG]
The build should be done in the next 4 weeks or so. I haven't built one since 1979. After a short "break in" I will tune it on the dyno and post the results.
Here's the build; If you need more specific info let me know.
Car -1988 GT
Dif - 373 positrac
trans - TKO
Engine - 347 stroker with girdle
Hawks Racing Forged Crank
SCAT forged H-style rods
Deck milled for correct heigth and compression
Trick Flow Forged pistons 9.1/1 compression
Custom fit of all pistons (.003) and file to fit rings with end gap .025
Main journals align honed after girdle install
All bearings and journals matched for clearance and elimination of taper.
All internals individually balance and then complete assembly balanced.
Comp cam .566/.570 lift, duration @ .050 232/236 lobe sep 114, and properly timed.
Rller tappets, roller rockers (1.6), and roller chain assembly
1/2" head studs
Trick flow heads with 2.02 and 1.60 valves, ported
Typhoon performance plus intake, gasket matched, phenolic spacer
42# Ford Racing injectors with matching MAF meter
Mallory Hifyre ignition
Paxton NOVI 1000 SC with 6# boost
BBK shorty headers
MAC off road H pipe
Prochamber catbacks
[IMG]local://upfiles/10436/F95842DB50694EC892AC98B65AEBF7DA.jpg[/IMG]
Thread Starter
4th Gear Member
Joined: Nov 2004
Posts: 1,724
From:
RE: Predict RWHP for my project for fun
I am very disappointed at this time. I feel it should be more like 450 RWHP. I think it must be one of 3 things, 1) not enough air, intake or small SC, 2) SC robbing too much power, it seems very hard to turn, 3) exhaust restrictive.
I am open to suggestions.
Air to Fuel Ratio was good on dyno, I had plenty of fuel with the 42#ers. The boost was reading 7# on the climb. The high boost could be a sign of restriction in the intake or exhaust. The belt squeals on the SC on almost every startup, the belt stretches and needs more adjustment after just a few minutes, this could be a sign of high friction in the SC.
I am open to suggestions.
Air to Fuel Ratio was good on dyno, I had plenty of fuel with the 42#ers. The boost was reading 7# on the climb. The high boost could be a sign of restriction in the intake or exhaust. The belt squeals on the SC on almost every startup, the belt stretches and needs more adjustment after just a few minutes, this could be a sign of high friction in the SC.
ORIGINAL: 87mustang347
daaaaaamn. i told u that intake was goin to be holding u back. that blower mite be a bit small for u too. do u have a boost guage on there. i highly doubt your seeing a full 6lbs of boost. maybe 3lbs if your lucky then 4lbs. put a boost guage on there and a smaller pulley and see what happens
daaaaaamn. i told u that intake was goin to be holding u back. that blower mite be a bit small for u too. do u have a boost guage on there. i highly doubt your seeing a full 6lbs of boost. maybe 3lbs if your lucky then 4lbs. put a boost guage on there and a smaller pulley and see what happens
Thread Starter
4th Gear Member
Joined: Nov 2004
Posts: 1,724
From:
RE: Predict RWHP for my project for fun
My first try to get the HP I should have is to change the Typhoon intake. I have on the way a Edelbrok Victor 5.0 intake. It should be here next week. I decided to start with it because of the higher than expected boost measured in the upper intake which may indicate restriction in the lower intake. The Victor 5.0 intake is designed for 400 to 550 HP, which should be where I want to be.
2nd Gear Member
Joined: Dec 2004
Posts: 328
From:
RE: Predict RWHP for my project for fun
ORIGINAL: angcobra
My first try to get the HP I should have is to change the Typhoon intake. I have on the way a Edelbrok Victor 5.0 intake. It should be here next week. I decided to start with it because of the higher than expected boost measured in the upper intake which may indicate restriction in the lower intake. The Victor 5.0 intake is designed for 400 to 550 HP, which should be where I want to be.
My first try to get the HP I should have is to change the Typhoon intake. I have on the way a Edelbrok Victor 5.0 intake. It should be here next week. I decided to start with it because of the higher than expected boost measured in the upper intake which may indicate restriction in the lower intake. The Victor 5.0 intake is designed for 400 to 550 HP, which should be where I want to be.
Sounds like a good plan, im waitin to se ehow it works out, and i hope ya hit your target
Thread Starter
4th Gear Member
Joined: Nov 2004
Posts: 1,724
From:
RE: Predict RWHP for my project for fun
The intake was not the issue. I have ordered a larger supercharger, it should be here on Tuesday. At the track it ran 12.6 @ 110mph with a passenger on street tires.
Thread Starter
4th Gear Member
Joined: Nov 2004
Posts: 1,724
From:
RE: Predict RWHP for my project for fun
Update.
Vortech S-Trim with 3.33 pulley made 415 RWHP. Big difference in the torque and HP curve before it was all the way to 6200 RPM to make 376 RWHP now it makes 415 RWHP at 5300 RPM. I may run this for a while and then pulley up.
Vortech S-Trim with 3.33 pulley made 415 RWHP. Big difference in the torque and HP curve before it was all the way to 6200 RPM to make 376 RWHP now it makes 415 RWHP at 5300 RPM. I may run this for a while and then pulley up.
Thread Starter
4th Gear Member
Joined: Nov 2004
Posts: 1,724
From:
RE: Predict RWHP for my project for fun
Update on this 347 stroker.
Cam timing was causing lean condition.
Cam timing was advanced 6 degrees.
Engine now makes >450 RWHP with a C4 automatic behind it.
Cam timing was causing lean condition.
Cam timing was advanced 6 degrees.
Engine now makes >450 RWHP with a C4 automatic behind it.
4th Gear Member
Joined: Jan 2005
Posts: 1,899
From: Assachusetts
RE: Predict RWHP for my project for fun
ORIGINAL: angcobra
Still waiting for that PRO-M 80 MM MAF meter calibrated for 42# injectors. While I wait I replumbed from the SC to the TB with larger pipe.
[IMG]local://upfiles/10436/B024F463A78B4FCB935D76E339894DC1.jpg[/IMG]
Still waiting for that PRO-M 80 MM MAF meter calibrated for 42# injectors. While I wait I replumbed from the SC to the TB with larger pipe.
[IMG]local://upfiles/10436/B024F463A78B4FCB935D76E339894DC1.jpg[/IMG]
The pro-M 80mm I heard doesnt flow as much as the 76 for sum reason?We just had to buy a new one for a 98 cobra and my tuner said not to get the 80 get the 76 cause the 80 is only good for 500hp??And you dont want a cog setup on it unless you have a auto tranny cause one missed shift and that belt is going threw the hood and I'm sure with that nice car you dont want that!!I say it has about 450rwh but with a little more boost you'll be over the 500 mark easy.My car with almost the same mods made 521rwh so you should be close.Do you have a fuel system in it yet??Cause if not your going to need it cause it will run out of fuel anywere up the 500 rwh if not before that.Nice car man Good luck with it
Edit I read more and saw what you made which is close to what I thought..Nice hopefully when its broken on more it will make a little more!Everyone always makes less than what they figure it will be thats just the way it is.
Edit#2 read more and saw you made just what I thought it would
