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  #16 (permalink)  
Old 11-14-2005, 03:06 PM
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I have a friend that had a similar problem with a 383. It ended up that his cam was degreed incorrectly, and his valve lash was way off. Have you checked these things? He has a 383 9.7:1 pro topline 200 heads 236 242 @.050 cam. His only made around 260hp 315tq. He has not had it back on the dyno yet, but based on how fast it is (low 13's 1/4) I would assume he is around 320hp. I think he is capeable of more, but his carb is really old and doesnt run right (holley 750) Also, based on other motors like yours, I would say you should be around 400 at the flywheel. With a 200R4, that would probably be closer to around 300-320 at the wheels running right.

Adam

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  #17 (permalink)  
Old 05-04-2006, 07:36 AM
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well i havnt been here a while and i found one of my old threads haha. Well i just pulled the car out of storage and im about to take the heads off this weekend for the hell of it really lol. Im gonna get some porting and polishing. I suppose while im at it i can check to make sure the cam is degreed right....how do i check that haha. I dont have one of those degree wheels so how to i check that...just make sure the dots line up at 6 oclock on the cam and 12 oclock on the crank right?

Also, another question i have now...if i decide to get rid of this demon, is getting a bigger carb. I always thought that going too big is also bad, but recently i was talking to my friend/co-worker Brent Davis (look him up on the net his name is all over the place cause of his 1200 rwhp mustang. He was telling me that having a smaller carb, means smaller venturis and the fuel will be pulled in with more velocity. He said i should get a 750, because the venturis are wider and wont pull fuel in with so much velocity...This is the first time i have ever heard of anything like this...but this guy is a true hotodder down to the scientific level. Hes done things on his mustang that havnt been done by anyone else and actually has companies calling him asking about how hes doing things. I remember at one point he got so anal, he actually drilled out a pair of jets to get in between jet sizes haha.

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  #18 (permalink)  
Old 05-04-2006, 09:19 AM
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If you want to give an old Pro Stock guy a shot at getting your combo tuned.

Janke Engines
5540 Dietrich Rd
San Antonio, TX 78219-2904
(210) 661-2654

Although if he has one of his big blocks on the dyno, you may decide to start saving up for a new engine!

If you just decide to replace your carb, the following link may be of interest:

http://www.pro-system.com/index.html
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  #19 (permalink)  
Old 05-04-2006, 09:28 AM
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ahh i should probably change that, i live in VA now
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Old 05-04-2006, 10:01 AM
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Quote:
Originally Posted by airman_turtle
ahh i should probably change that, i live in VA now
Too bad, Jerry could have fixed you right up. He helped me with several projects while I was stationed at Fort Sam Houston (Camp Bullis training area).
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  #21 (permalink)  
Old 05-04-2006, 10:06 AM
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In yor first post you expected high 300's at the wheels. Assuming 20% loss thru the drivetrain that's 375+20%=450hp.

If whatever carb you choose performes perfectly, I haven't seen a off the shelf carb in a while that works as good a custom built unit, You still not gonna reach 450hp with that engine. While 9.5 is rich, it's not that bad and isn't costing you as much power as you might assume. My guess is a net increase of 25hp max. I'm bringing this up becuase I don't what blowing a ton of money on stuff looking for a ultimate HP No. that not obtainable using your current head and cam combo. Porting those heads are not going to net you much because they are already on the large side. Not overly, but getting there. You can increase the low lift flow that will help and total flow won't net a large enough increase for you to reach a 450 goal because you not using all that head anyway. I think you need a cam in the 245@.050 range and that's getting out of the acceptable slow speed power with pump gas.

Please don't be offended by my statement's. It's just a opinion. I've got lots of em.
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  #22 (permalink)  
Old 05-04-2006, 10:24 AM
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yea i was actually looking at different cams today. Its the next step up from mine and the duration i think was 245 and the lift was 501, but the rpm range is 2500 to 6500 which is 500 past my redline...i mean im sure i could take it that 500, but i guess i just havnt tried. But the low side of it also seems kinda high, would that mean i wouldnt have sharp "torquy" response down low?
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