S/T 2.5 short stroke twin plugg

[Zithlord]

What would be the most correct/best case to use for this engine build. With the 66 crank, what cyl/pist would you use and would the case have to be modified to take the cylinders? Would you shuffle pin the case?

Thanks
John

[karlusmagnus]

John, this question had a Norwegian bent to it, but you may have seen it already. From Pelican
http://forums.pelicanparts.com/showthread.php?t=436892

and this thread that Henry @ Supertec referenced
http://forums.pelicanparts.com/showthread.php?t=434823

I believe Curt has a 2.5 so he may be able to advise. Or someone else who has already done it.

[Zithlord]

Thank you for the link Karlusmagnus!

John

[advtracing]

i am also looking at building a s/t 2.5ltr but a long stroke using a 2.4t engine as a starter .
If some s/t 's used mfi and some didn't , what carbs set up did the ones with out mfi use?

[karlusmagnus]

John et al


Please refer to post number 635 to 638 on the targa florio thread on page 43 it's a good starting point.I also have additional info and can also provide info on the 2380 engine.Let me know.I believe most build these in a magnesium 7R case but would have to look it up.

Raj

John let me know what else you need

here it is
http://www.early911sregistry.org/for...368#post183368

Karl.

[advtracing]

John et al


Please refer to post number 635 to 638 on the targa florio thread on page 43 it's a good starting point.I also have additional info and can also provide info on the 2380 engine.Let me know.I believe most build these in a magnesium 7R case but would have to look it up.

Raj

John let me know what else you need

hello raj,
You couldn't scan that spec sheet and flick it through on the email ?
advtracing@gmail.com

[Steve@Rennsport]

FWIW,....There are still a few Mahle 89mm P/C sets (Nikasil) made for the IMSA 2.5 litre GTU motors w/66mm cranks still available. These have 97mm spigots so the cases need to be bored to use them.

Let me know if I can help.

[kenikh]

2.5s are for pussies. Go with the ORIGINAL ST motor, an 85x66, 2.3L big cammed beast of a motor that made 250 HP at 7800RPM.

http://books.google.com/books?id=QJV...i8Bg#PPA109,M1

[CamBiscuit]

Does anyone still stock the Mahle 86.7mm pistons & cylinders for the longstroke 2.5 motors?

Somewhere around 10.3 or 10.5 compression?

If available are they Nikasil?

Or are JE / Nickies the only way to go?

Thanks

[Chuck Miller]

Try this Cam.......

http://www.andial.com/content/mahle/newlatermodel.htm

Cheers mate