GUY HERE IN TOWN that had one of the better marine repair shops had a SFI 302 OMC tried to purchase it a couple times. Last i knew it is sitting in a corner in the field were his shop was it has the...
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GUY HERE IN TOWN that had one of the better marine repair shops had a SFI 302 OMC tried to purchase it a couple times. Last i knew it is sitting in a corner in the field were his shop was it has the...
I WORKED WITH THE ENGINEER that was in charge of designing the gt40 heads. they were for marine use initially guessing for OMC as they were about the last to use SBFs. Porting them would be the best...
GT40 heads if available as a start
a couple thoughts have come to mind. one is the edelbrock heads have a 1 3/8 x 1 3/8 port i believe this is a bit larger than a stock ford head possibly larger than most SBF gaskets. Is there enought...
i can understand all your concerns. have built engines for many different venues ported a lot of heads and flow tested many competitors. example a set of edelbrock roval port heads that i installed...
bottom one on this page for flat tappet hyd
http://www.cranecams.com/212-219.pdf
top 2 here maybe 3rd one for hyd roller
http://www.cranecams.com/220-223.pdf
not necessary this brand but...
i ported GT40s that out flow the smaller port edelbrocks and others say in the 165 170 180 cc port sizes.
The 351s need a bit larger ports than the 40s actually but ported well do some low end...
MIGHT use someting like the heads here with 170 cc ports and 1.9 valves
http://www.edelbrock.com/automotive/mc/cylinder-heads/ford/performer-rpm-sb.shtml
Also might consider GT40 heads ported
I would want a cam with about a .500 lift thats about were most SBF heads peak flow
something like a B cam with a bit more exh duration to make up for wet exh but should be no reversion
A torqer...
Those style plugs most of the time dont work well in old style engines.
Sold
Looks like one of my grand fathers friend Mr Lymans boats. He owned several of them over the years.
Had a set center rises on my 454 no issues there for sale 400.00 for the pair
Dont know your heads air flow but well done there small for that many cubes. Also you will have a realy ruff time finding spark plugs in the proper heat range as most popular plug for a sbf with 18mm...
Cant do it everywhere but where possible I use machinist screws and a nut. For sealant used the above water line version of the 5200 sealant think its 4200
Bigest hold back on a 351 ford are the cylinder heads they were designed for a 289 even though the older 351s had slightly larger valves and ports. Best to go with aftermarket heads as a start. First...
Have you checked the impellers in the water pump? I run racing water pickups and crossovers My issue is low speed can run hot especially off plane and idle. On plane no issues. Have also had issues...
tHAT SHOULD BE e7 HEADS about the worst flowing SBF head. They might be good for about 300 HP but to do it might cost a bit of low end. Ported a set of E7s could produce around 400 HP and have a very...
THE ONLY LIMITATION might be the spring pressure. What were the heads part number
Sometimes wounder just how safe it would have been if I had installed the twin turbo 302 that i would have built to install in it.
The valley of the block should have the features required to use roller lifters. Can you get a picture of the valley?
Hey Mat woundering what happened to my 66 16?
E6 heads were the non HO heads most of them could be found on grand marquis and crown vicks.
I have been building engines for over 45 years for cars , boats , street strip, drags, circle track, road course, economy, trucks. I look more towards how big a prop can be run more than worry about...
I dont recommend vacuum secondary carbs for marine use on a rather fast boat as if the throttle is shut down quickly the quick shutting of the secondary's could shove the bow into the water.
...