Boats For Sale:
gt-40 heads and performance |
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stang72 
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Joined: July-31-2004 Location: United States Status: Offline Points: 1608 |
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 Posted: August-29-2006 at 7:20pm |
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Always tinkering Right!
Big price diff on the intake!I think I will go ahead and get the typhoons... I like the polished look too. Sense I already have the heads...won't cost much ! Still have a some time to get them on and play a while 
Thanks all for the input! Chris...regarding parts boat...do you have the black round floor access ports(what ever they are called)? |
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79nautique
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Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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Posted: August-29-2006 at 6:47pm |
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i don't know about the clearance, It shouldn't be an issue by the looks. The main reason I like them is they are bacisly like the edlebrocks but cheaper and they have a cross over on the rear coolant pa$$age that almost all others don't.
Just got a call from My machinist and the DOOE heads are done ported and ready to bolt on so It sounds like I have a winter project to get them bolted up, a new chrome intake, and the Edlebrock exhaust mounted too. |
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stang72
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Posted: August-29-2006 at 6:34pm |
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Thanks TRBenj and Chris! I checked ebay for the professional products "Typhoon " Intake...145.00 + 20.00 (shipping) for polished alum. That looks like a good deal! Looks cool too!
Any clearance issues? |
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TRBenj
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Posted: August-29-2006 at 1:52pm |
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Gary, Im not Chris but Ill chime in anyways. A 302 aluminum intake is a pretty inexpensive upgrade, so I think its worthwhile- anything to help flow. If youre just doing the heads and intake, the Edelbrock Performer should give a nice improvement. '79 also likes the brand thats very similar and a little cheaper, I think its called Professional Products.
Once you go that far its time to start considering a cam... and if you want to turn a little more RPM, the higher rise dual plane intake manifolds breath even better for midrange power- Performer RPM, Weiand Stealth etc... but I guess we should take it one step at a time! |
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stang72
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Posted: August-29-2006 at 12:40pm |
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TRBenj...that is enough motivation to go to the garage! Thanks!
Chris ...what are your thoughts on performance intakes in addition to the swap? |
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TRBenj
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Posted: August-29-2006 at 9:28am |
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Gary, we swapped in the GT40's on our old '92 (351w). The engine had no other mods (intake, cam, etc). The boat picked up a solid 3 MPH, so we saw a real nice improvement.
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stang72
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Posted: August-28-2006 at 11:21pm |
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He-- yes it is!
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The Dude
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Posted: August-28-2006 at 11:12pm |
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I don't know specs, but I sure hope your boat will be faster than hers. That's an important goal to have!
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Mullet Free since 93
95 Sport |
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stang72
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Posted: August-28-2006 at 10:33pm |
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Any one know what the torque speck are...good rainly day project, and it's been raining...plus my wife won't know that I took the gt's from her boat
 and her's should not be faster than mine right?
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p/allen
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Joined: March-14-2006 Location: Dixon Illinois Status: Offline Points: 942 |
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Posted: August-28-2006 at 9:45pm |
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I think that if you change to the gt-40s, you will only notice difference up over 5000 rpm where quicker air flow from the bigger valves becomes an issue. You also will have a bigger combustion chamber there for less compression ratio. I think....
Pat |
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stang72
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Posted: August-28-2006 at 9:25pm |
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Chris...They would go from one 302 to another 302...no drilling !
What diff in performance could result from just a head swap? How much better with another intake(edelbrock )? |
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79nautique
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Posted: August-28-2006 at 9:19pm |
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gary you have to have them drilled out to accept the larger head bolts that the 351 uses other than that it's bolt on
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stang72
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Posted: August-28-2006 at 8:55pm |
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I know there are many threads on these heads...anyway a couple questions.
I have a set of cast gt-40s (marked GT) on my 302 in a mustang(low hrs), PO had them just installed before I bought it...I am thinking of swapping them to the 302 in my 72 SN. Is it as simple as unbolt and swap? Also...what kind of performance should I see if I just swap heads and no more? Will performance be much better if adding an edelbrock alum. performer intake? I would be tickled pink if I could gain 2-3 mph on the top! Also...I have a complete 302 sitting in the garage(good shape)...Might want to see what I could have done to that engine and use the heads on it...any performance recommendations? |
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