Offshoreonly.com - 454 with 177 blower build

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Thanks Mike good to know

Quote:

Originally Posted by ealesh33 (Post 4279581)

Not sure, pm me your name. It's going back in a 27 fountain fever, single step, the 525sc is what came in the boat from fountain.

That's going to be a lot of fun in a 27 fountain. I believe we were agreeing in a thread on facebook that 10.5:1 compression with iron heads and a basically stock non mag roller cam was a bit of a mismatch. Dave M..

Quote:

Originally Posted by ramos45 (Post 4279528)

Black Baja - do you have pics of the 3" blowre pulleys you have? I'm dynoing with the stock 3.5 upper and 7 lower. Depending on how much/(little) boost I have I may be in need of your pulleys.

PM me your email and I can send you pics of the pulleys. IIRC they were slightly under 3" diameter, but can verify if you get serious about needing them.

Heres a build I thought was also pretty good in the swap shop. Less than 5lbs boost, 686HP at 5900RPM, with Merlin heads. Those merlin heads were a good head, but not really known for big flow.

Quote:

Originally Posted by Precision (Post 4192142)

Gen V 468 with forged rotating assembly, hydraulic roller cam, new Comp Magnum roller rockers, Merlin heads and TBS polished 250 blowers. I bought these motors to put in my fountain project to get it on the water this summer, but the hull ended up taking longer to get ready than was projected. They were originally built by Performance Marine last fall and had only 15 hours on them when I bought them. When I got them back to the shop I ran them on our Superflow 902 engine dyno and found that the motors had a little less than ideal hot idle oil pressure. We pulled the pans and all main, and rod bearing clearances per perfect. We opted to replace the stock oil pumps with Melling HV/HP pumps and drives and now they have great pressure at RPM and idle.

The motors are set up to make 4.5-5 PSI of boost with the pulleys that are on them and with a top pulley swap they make 7 PSI (93 octane) and 730HP. They are equipped with 1050 Dominators that were worked over by Nickerson.

5 PSI dyno pull
http://i99.photobucket.com/albums/l2...ps1da6282d.jpg

$22,000.00 I can also set them up for EFI for an additional $3,000 per motor. We can palatalize and ship freight at the buyers expense.

Call 309 531-7291 or email [email protected] for questions.

http://i99.photobucket.com/albums/l2...pswgbcsinl.jpg
http://i99.photobucket.com/albums/l2...ps6xqjdwjn.jpg
http://i99.photobucket.com/albums/l2...psf948153e.jpg

Quote:

Originally Posted by MILD THUNDER (Post 4279758)

Heres a build I thought was also pretty good in the swap shop. Less than 5lbs boost, 686HP at 5900RPM, with Merlin heads. Those merlin heads were a good head, but not really known for big flow.

Looks like that TBS 250 gives up almost 40TQ to the 177. Dyno racing, we're the fastest on paper! Lol
Good information everyone, thanks.

Quote:

Originally Posted by Rookie (Post 4279843)

Looks like that TBS 250 gives up almost 40TQ to the 177. Dyno racing, we're the fastest on paper! Lol
Good information everyone, thanks.

Or was it the iron merlin heads ??

My engines made 736ft lbs with 420 blowers .....

I wonder what compression and cam that setup has

Quote:

Originally Posted by ealesh33 (Post 4279454)

Well maybe Marks will, my blower is looser, should definitely run cooler ;)

not sure about this.mark,s blowers are stock just like the day they were made.have yours been modified?

Anyone care to take a guess at my hp? I've never dynoed my engines but know they make good power because they can push a 1988 panther into the ninties. I always assumed in the area of 650hp but looking at some of these builds and hp it could be more.

6055 edelbrock rectangle heads
9.5:1 static compression
8.2 dynamic compression
731 cam
6psi at 5400rpm
1050 dominator
468cid

Quote:

Originally Posted by blue thunder (Post 4279862)

I'm gonna guess its making some good power. Prob closer to 675. I'd like to think a little more cam and 5800rpm and you'd be screaming.

I've just bought 741 cams to spice up things a little for next season. I was thinking I'd get 200rpm from that change using my 32p bravos, same props as last year, putting rpm at 5600. So we are on the same page MT. I have 30p props too but don't like running them because a typical run we do will be over 100 miles and cruise is important too.