4 valve swap questions... - Page 2

Brian W. · 10-30-2009, 03:04 AM

also wondering what headers to use even though i see you turboed that one there.

thanks!

Dan · 10-30-2009, 11:42 AM

i would just manifolds or find a set of used long tubes to check clearance the S197 has more room so i think that the 03-04 stuff will work just fine

Wes@PHRP · 10-31-2009, 12:03 AM

Quote:

Originally Posted by Dan

I’m a little confused. I didn’t have any of those issues. The biggest issue would be using the stock computer and making the twin cam sensors talk to each other and the PC along with getting the cam signal to talk to the PC using a 4v timing gear. But we found out how to do it. We started this car back in February this is a direct bolt in with no issues the cooling is not a big deal either as a matter a fact I use a 98 cobra thermostat and stock hoses from that same motor. The upper hose was a little tricky because we had to trim 3 inches off the stock cobra hose. And to think we did this around a turbo kit. but it was no real big deal

Dan thanx for the info... I was assuming he was doing the same conversion I'm currently doing and it sounds like he's using an aluminator or another 4valve. As you know I'm doing the GT500 motor and the cooling setup is extensive and expensive... It can be done easily for some one with a shop and the proper prices,parts and tools. Maybe issues was the wrong word as to say just need a lot more than the engine.

belinda06GT · 10-31-2009, 02:45 AM

Quote:

Originally Posted by Brian W.

i was pretty sure that all 4v were the same outside dimensions. but what about the blocks... are the all the same externally(3v and 4v)?

did you just get an aluminator long block and bolt the 3v accessories to it then?

The 4.6's are a short deck, the 5.4's are a taller/ wider long deck. The heads, be it 3v or 4v are essentially the same size for the 4.6's and 5.4's, however the intake manifolds are wider for the 5.4's. the 5.4's are also slightly taller and wider.

Brian W. · 10-31-2009, 09:46 AM

right, taller deck height from the 5.4 would make it larger.

ok, well im just gonna do this and make everything work. haha.

the motor im using a is a terminator(03-04 cobra)... BUT i am planning to use the cobra internals in an aluminum block from a mark8.... which i also hope will all work.