what do they mean by saying to upgrade my 2.3 95 cylinder head to a 086 or 753 what do those come out off 2.4 or what because of bigger exhaust ports?

the 086 head is the 2.3 HO head off a Beretta GTZ or similar.
I'm not sure what the 753 is though.

according to a guy in mantapart there are this 2 options

thats your 1st mistake, listening to mantafart



Im a Xbox 360 fanboy...and damn proud of it!!

why let me know cause im about to do bussiness with them

Stop and walk away

Mantapart WILL take your money and WILL NOT give you parts. A simple search will let you know all that youe need to about that horrible couple.

man that was close thanks alot for the info i was ready to buy a cylinder head used that they offered for a decent price,but not no more u guys are great

90-92 quads, yes all, can come with 086 casting.

exhaust ports and all valves are bigger then your head.

Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Taetsch Z-24 wrote:90-92 quads, yes all, can come with 086 casting.

exhaust ports and all valves are bigger then your head.

Chris

So what would you use for a header?



8 psi with m62 and IAT under 100

From what i remember the 753 casting was the later version for the HO's and the "updated" (only) replacement available through GM. Apparently they replaced any cracked or otherwise unusable 086 with a 753 (warranty work etc.) so it is possible to see the 90-92's with a 753 head. I think the 086 flowed better and i dont recall the reason they changed to the other casting as i havent played with (or researched) one of these heads in a few years now.
Thats all i can think of off the top of my head, i will have to see if i still have my stack of 086 info around somewhere


_





Now with northstar V8, IRS, 20's n 22's

Cody Star wrote:

Taetsch Z-24 wrote:90-92 quads, yes all, can come with 086 casting.

exhaust ports and all valves are bigger then your head.

Chris

So what would you use for a header?

Most who do this swap would just use the HO factory exhaust manifold. They claim it flows better than a modified 2.4 header would since it only has 1.5" primaries and the manifold is bigger. I used the supercharged lsj header for a cobalt with the 1.75" primaries and had it modified to fit.

The stock LO 4-2 headers are also a good choise IMO. 1 5/8 primary's and stainless steel.

Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08