I know better now! I think we would all be in a better mood if mptrimshop would just post up that other page on his browser!

AFR 265 vs Dart 270. Which one will make more torque from 1100rpm to 1500rpm

Bobl..what kind of sound are your 400hp sbc's making. What does it take to make a mean sounding SBC, always loved the lope of the HP500's, 500EFI, and 525's. Is it possible to get a small block to have this exhaust note, at times I feel my stock 350 MPI mags sound weak at idle.

I rebuilt a totally stock 6.2 a few years ago. It made around 350 hp at the crank on my dyno. I 've measured a consistent 10% loss through the drive on many engines tested at the crank, then installed in the boat and retested at the prop. So 350 is right in line with Merc's 320 PSHP claim.

Looseconnection, It's really all about the exhaust. You put some cmi headers on a sbc you can get aggressive on a cam and it will sound great and make nice power.

If you guys cant keep the thread on track I'm going to close it. I already cleaned this up once, next time I will issue timeouts.

BobL - thanks for the loss info on crank to Bravo 1 propshaft horsepower. I went to the CMI site and they claim a fair increase in h.p. with their headers over stock on the 6.2s. Other members have said they got zero m.p.h. increase after the install. Have you done any dyno work to support this exhaust manifold change?

SpeedGirl - sorry you have had to work overtime moderating this thread. It is disappointing to see the number of replies going way up, and then reading responses that have nothing to do with the original post. I appreciate the expertise of those on this site.

Looking here: http://www.mercruiserparts.com/selec...doc_nbr=878366 most of the parts are still available. Most are expensive though, especially the crankshaft.

Examples:

938-8412812 HEAD, Cylinder $1,130.48 $973.68
429-842405 CRANKSHAFT $4,770.53 $4,108.84
431-849195 CAMSHAFT, Roller $1,377.57 $1,186.52
807352A2 MANIFOLD ASSEMBLY, Intake $1,362.16 $1,220.02
861484A1 BODY ASSEMBLY, Throttle $553.30 $487.68
861334A5 PLENUM ASSEMBLY, Intake $808.30 $712.44

Sorry boys no porn site URL's or opinions about homosexuals but I did have some info that the
OP may appreciate.

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