Results are in on my 370 build!!!!!!!!! Not so good IMO
05-22-2012, 04:11 PM
#1
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Results are in on my 370 build!!!!!!!!! Not so good IMO And I am at a cross roads. My tuner and I where left scratching our heads.
414 was all it put down.
M6 car, Ford 8.8 with 4:30 gears. 370 with wiseco flat tops. .040 head gasket
stock crank. comp should be around 11.6:1. Bosch 42 lbs injectors, walbro 255 pump, comp 240 244 608 612 on 112 lsa cam, Patriot cnc'd 243's milled to 59cc matched ported to intake gaskets by me, Professional Products 96mm intake matched ported to gasket, 101mm tb, 95mm maf, 1 3/4 long tubes with ory pipe going into a flow master. I think that about does it. I've got a mismatch somewhere. Something is not jiving in this set up. Had good A/F ratio through out pull. But at about 5500 it started seeing vacuum.
Anybody got any good insight on what might be the deal. I might have to scratch the whole top end and and go another route. Could it be the cam?
Had no issues with fuel flow or duty cycle on injectors. They were running at 60% at WOT. Just kinda need some constructive opinions and thoughts from experienced people. Thanks
BTW, peeps go out to my new tuner - jonCR96Z. He got it running great. Can't say so much for another shop in Randleman. If your in the area, hit him up and he'll do you right.
414 was all it put down.
M6 car, Ford 8.8 with 4:30 gears. 370 with wiseco flat tops. .040 head gasket
stock crank. comp should be around 11.6:1. Bosch 42 lbs injectors, walbro 255 pump, comp 240 244 608 612 on 112 lsa cam, Patriot cnc'd 243's milled to 59cc matched ported to intake gaskets by me, Professional Products 96mm intake matched ported to gasket, 101mm tb, 95mm maf, 1 3/4 long tubes with ory pipe going into a flow master. I think that about does it. I've got a mismatch somewhere. Something is not jiving in this set up. Had good A/F ratio through out pull. But at about 5500 it started seeing vacuum.
Anybody got any good insight on what might be the deal. I might have to scratch the whole top end and and go another route. Could it be the cam?
Had no issues with fuel flow or duty cycle on injectors. They were running at 60% at WOT. Just kinda need some constructive opinions and thoughts from experienced people. Thanks
BTW, peeps go out to my new tuner - jonCR96Z. He got it running great. Can't say so much for another shop in Randleman. If your in the area, hit him up and he'll do you right.
05-22-2012, 04:39 PM
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Staging Lane
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That's what I was thinking about the intake; junk..... I was also thinking cut outs and leave the flow. It sounds to good to replace it. It just got broken in real good. LOL.....
05-22-2012, 04:41 PM
#4
05-22-2012, 05:05 PM
#6
I would ditch the Flowmaster period. With a cutout you will have to open it for power and then it will sound like crap. A good flowing, good sounding exhaust is better than a cutout.
Not sure what you mean by "breaking in" since it is welded baffles...there is nothing to break in.
What lid do you have on the car? Or some other kind of filter?
Not sure what you mean by "breaking in" since it is welded baffles...there is nothing to break in.
What lid do you have on the car? Or some other kind of filter?
05-22-2012, 07:17 PM
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Cut the flowmaster off. I've had a 390 rwhp cam only car pick up 38 by cutting it off, 470 rwhp GTO picked up 73 by cutting it off, etc. See it all the time while tuning. Customers can't believe it. 
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05-22-2012, 08:55 PM
#10
It blows my mind that people still to this day install flowmaster catbacks on F-bodies when there is a wealth of info out there about how restrictive they are.
Anyway. You're probably losing 25rwhp at least through the muffler. Fixed that problem and replace that POS manifold, and you should be in the 440-450 range. That's about what a 370ci is going to make with Patriot heads on it.
Good luck.
Anyway. You're probably losing 25rwhp at least through the muffler. Fixed that problem and replace that POS manifold, and you should be in the 440-450 range. That's about what a 370ci is going to make with Patriot heads on it.
Good luck.
05-23-2012, 02:23 PM
#12
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It blows my mind that people still to this day install flow master catbacks on F-bodies when there is a wealth of info out there about how restrictive they are.
Anyway. You're probably losing 25rwhp at least through the muffler. Fixed that problem and replace that POS manifold, and you should be in the 440-450 range. That's about what a 370ci is going to make with Patriot heads on it.
Good luck.
Anyway. You're probably losing 25rwhp at least through the muffler. Fixed that problem and replace that POS manifold, and you should be in the 440-450 range. That's about what a 370ci is going to make with Patriot heads on it.
Good luck.
And thanks for the input..
05-23-2012, 02:37 PM
#13
If you can't do duals the only semi-permanent compromise I would run on a car I owned would be 3" y into a good merge to single 4" with a good muffler. Still have that crappy y pipe sound but at least it would flow.
Loudmouth does not sound good at all on a modded car.
Loudmouth does not sound good at all on a modded car.
05-24-2012, 06:08 AM
#16
+10 with everyone above about the Flowmater and Intake..
Another thing will help is 1.7/8 headers (Check TSP 1.7/8 headers for great price and power.
I have a friend gained 38rwhp 21rwtq going from flowmaster to open Y-pipe on cam only F-body I did the dyno myself I couldnt believe it.
Another thing will help is 1.7/8 headers (Check TSP 1.7/8 headers for great price and power.
I have a friend gained 38rwhp 21rwtq going from flowmaster to open Y-pipe on cam only F-body I did the dyno myself I couldnt believe it.
05-24-2012, 06:29 AM
#17
It blows my mind that people still to this day install flowmaster catbacks on F-bodies when there is a wealth of info out there about how restrictive they are.
Anyway. You're probably losing 25rwhp at least through the muffler. Fixed that problem and replace that POS manifold, and you should be in the 440-450 range. That's about what a 370ci is going to make with Patriot heads on it.
Good luck.
Anyway. You're probably losing 25rwhp at least through the muffler. Fixed that problem and replace that POS manifold, and you should be in the 440-450 range. That's about what a 370ci is going to make with Patriot heads on it.
Good luck.
05-24-2012, 07:22 AM
#18
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Well, the last time I checked they were not free. But if you want to buy them for me, I'll pm you my address and you can drop ship them to my house if you would like. LOL. This car hasn't nickled and dimed me to death it's been more like 500 and thousand. The wife is not going to go for no 1800.00 for exhaust. I just dumped 1200 in some meats for the back and front. I'll just have to start saving some mad cash back until I get enough saved up to get some duals and run the muffler I have now. One thing for sure it may choke it to death but it does sound good. never had a negative comment about the sound. But sound don't move it down the road and make good numbers, so it's gotta go........
Last edited by Chicken Coupe; 05-24-2012 at 07:28 AM.
