Pliant

This winter is unusally long for some reason econ is just as slow and i have way too much time to daydream. So i picked up a new edelbrock carb and intake on black friday for under 500....50 off for a purchase and free shipping..what a mooch. Big blocks are new to me and doing some snooping around i found one can put a very cheap cam in for peanut's....literally. Since i will have the intake off why would i not spend another 140 and drop in this cam....http://www.summitracing.com/parts/SUM-K03072/ Here's the big question that cam is so dirt cheap by itself i feel obligated almost but i dont want to pull the heads..thing's will get out of control i know how i work...will the current spring be ale to operate with that cam that's the big question..Leak down test down and compresion the motor is in very good shape.

As to the exhaust it has stainless manifolds and thru the hull the rest of the engine is bone stock...400 hours Acutally not sure but i like 1.0 a bit better...i know the limitation's of the heads it just so cheap if i can get by with the stock spring's.

1. http://www.summitracing.com/parts/SUM-K1300/
2. http://www.summitracing.com/parts/SUM-K03072/ missed the lsa...out

1BIGJIM

iTrader: (1)

Any time you change a cam you should change the springs to match the cam.
When looking for a cam you need to have a Lobe Separation of 112 or 114. One of those cams was 106.
You are not going to see much gain just by changing a cam and intake. IMO save your money for gas and beer.
Also I would never consider a flat tappet cam. No much chance of wiping out a lobe and that will take out the engine.
Good luck!

dereknkathy

is yours a stock round port or square port motor? if round port, send intake back and start over...the 2nd cam is drag strip cam. won't idle, will suck water in from exhaust.

Pliant

http://www.summitracing.com/parts/ed.../applications/

Ports dont match on that intake?

http://forum.grumpysperformance.com/...t+heads#p18448

Your are right

Griff

The cam you posted is a car cam and has 106 Lobe sep. It will suck water back into the engine. You really want a 112 or higher lobe sep.
To make any cam upgrades, you need exhaust that has long risers that don't mix water into the exhaust until its near the transom.

A low budget marine cam is a Crane 134242 cam kit.

GPM

Just a thought, http://www.summitracing.com/parts/cc...make/chevrolet

MILD THUNDER

iTrader: (3)

What model 454 do you have? Some had the Rectangle port heads, some had the small oval 'peanut' port heads.

The peanut port engines had low 7.9:1 compression. The rect port engines had 8.8 or so compression. Last thing you want is a big cam, low compression combo. It will be a soggy turd.

phragle

iTrader: (3)

Just put a big enough blower on it to make up for the low compression. May not live long, but it will run faster than the hot chick back in 10th grade did when you told her you wanted to eat her out untill her head caved in.......

dereknkathy

basically what I was saying in my post #3. if 330 lopo motor, search 330 on roids on here. some ideas about getting 400 or more out of this engine. but putting a cam and intake on those heads is a waste of time-money...

Pliant

Ponder's that thought for a moment......Ok bad ideal........... but it does has some merit...


The truth i do not know. Marine is very new to me in a sense. Original equipment is 87 454 alpha combo but it blew in 89 and the owner had a new long block put in. This boat was bought last year and i had very little time with it..its a good freinds boat and he is very impulsive he just wanted to get on the water and have fun. I have spotted many issues and noticed some strange thing's..One thru the hull exhaust 24' chrome tubing....stainless exhaust manifolds's..stock carb and intake..very slow to rev..very. Overheat's above 3500 rpm many thing's. The other side of the coin it's a 87 mirage almost pristine it was gargaged the whole time and a local marinia serviced it..so to speak. Were about to restore the thing and i am trying to build a path that make's some sense in term's of cost and yeild.It may have a typical 454 330 hp factory engine or a mag replacement who know at this point i dont have access to the boat.

There are two paths to go down here one... a stock 454 with cast internals or a mag replacemnt..again another path. A true mag and i will know how to play so to speak.. cast internal's well i am figuring that out. Its so easy to play with a short block and gain's, with a big block there's that thing called tourqe and that has ramification's

If it is a mag i know the way to go...If it's a 330 i am palying with low cost and maxium return...ive never played by the rule's nor am i going to start...OSO has been very enlighting for me, to pose question's and get answer's i never thought of....it's is very intresting. As of know i know i can do some slight porting actually grinding and polishing and get 420 ish out of a stock 330...Ohhh then's there's the drive....alpha 1...Or another 1000 and a volvo sx drive (donor boat)...I am anticpating a 330 454 another thousand for the motor and another thousand for the drive...a few days for labor and off to the race's....400+ hp sx drive. As to money 8500 for the boat...10500 with the motor,,,,,,and maybe another 2 grand for a face lift...It should be intresting....i am not one to blow money and pound my chest.....Bust Out Another Thousand....Only if it makes sense.................. phragle now as to her single mother....