*Sam* said:
Yes indeed they are big bucks, unfortunately running standard ones doesn't seem to be an option.
I had the exact same thoughts when i installed a 2110cc type 1 engine.
So i asked the people who made the heads what they thought. Perhaps you could ask whoever manufactured the heads on your 2007. Hope this helps you - My email and the reply below:
Hi Roy
I hope you can help me with some advice please.
I have a 2110cc engine in my Bay window bus, paired with a set of your 042 heads. The performance of the engine is great, i'm sure a lot of it is down to your heads which my engine builder thoroughly recommended to me. I've since recommended them to others.
I am currently running the engine with standard VW heat exchangers, a bugpack exhaust header and a 2.5" stainless steel turbo muffler.
Should i be using heat exchangers running this 2110cc engine with your 042 heads?
There appear to be differing views on whether a big engine like this should be run with or without heat exchangers.
Some have said larger engines with 35.5mm exhaust valves will cause damage to cylinder heads if run with heat exchangers.
Others seems to say there will be no issues except a very slight loss in power if i stick with my heat exchangers.
I know the mofoco heads have extra cooling fins and im really keen to get your opinion please. I'm from the United Kingdom, which is colder than most parts of the US, if possible i would like to keep the heat exchangers, but i don't want to risk damaging the cylinder heads. Your advice and experience would be gratefully received.
Kind regards
Paul
From: @mofoco.com>
Date: 28 May 2013 16:58
Subject: Re: Mofoco 042 Heads, 2110cc stroker engine with heat exchangers?
To: Paul
Heat exchangers
Hello Paul,
Yeah, I always love this debate. Here is what I know for sure.
Using the standard heat exchangers will not kill your engine. I do agree that you will lose some potential power but probably less than 5hp. If you are in the market for new heat exchangers, you should definitely buy the 1 1/2" ones. If you already have a set that are 1 3/8", I would run them. As long as the rest of the engine is set up correctly, you won't have any problems.
Please let me know,
Roy