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914World.com _ 914World Garage _ Need opinions on which heads to use on /6 2.7 build

Posted by: tornik550 Sep 15 2015, 05:25 PM

I am building a /6 2.7l with JE 9.5:1 Pistons. I am using E cams and I have 1.5" MSDS headers. Here are the tow head options that I have. Car is for street fun, no racing. In formulating your opinion please consider a nice balance of cost/ performance. I am not necessarily looking for the heads with the best performance. For example if there is a huge cost difference however only a slight performance gain- obviously go with the cheaper...

Which would you use-

Option 1- 2.2E heads completely rebuilt and ready to go. The intake ports were ported from 32mm to 35mm. The exhaust is the stock 32mm however it was "cleaned up" using a flow bench which did improve numbers however I do not know how it is compared to a stock 2.7l head. I do not have a way of getting the flow numbers now. These obviously would be free since I own them and all the work has been done.

Option 2- 2.7l heads that need completely rebuilt. not sure how much it costs to completely rebuild them however I would guess around $1000. The only potential benefit with these heads are that the exhaust ports are stock 35mm vs "cleaned up" 32mm.

I have spent sooooooo much money on this engine and I don't want to spend much more unless it would be worth the extra money.

Posted by: Travis Neff Sep 15 2015, 05:31 PM

the 2.7 heads would be 35mm only if they are for the S model.

Posted by: tornik550 Sep 15 2015, 05:38 PM

QUOTE(Travis Neff @ Sep 15 2015, 07:31 PM)

the 2.7 heads would be 35mm only if they are for the S model.

Yes mine are 2.7 S heads

Posted by: johnhora Sep 15 2015, 08:19 PM

How about selling the 2.2E heads to finance the 2.7S heads rebuild.....

Posted by: rick 918-S Sep 15 2015, 08:29 PM

Here's an option the 2.7 and 2.7S heads unless your having the injection ports welded.

http://www.914world.com/bbs2/index.php?showtopic=263516

Posted by: porschetub Sep 15 2015, 11:40 PM

You are running carbs,right?,the 2.2S heads will give you nice power /torque down lower in the rev range, you won't run out of puff until you get way up in the rev's which you don't use much anyway.
IMO you will be fine with these heads....that you already have, others may disagree.

Posted by: TVRLOTUSTR3 Sep 16 2015, 04:39 AM

E cams like small ports, Solex and S cams like big ports.