That was a joke. With that compression, I'm sure it's race gas only. Probably 105 or better, depending on what they did with combustion chamber design.

 

it'll prob run nicely on E85 heh.

maybe i should take a trip over to his place and check it out. it's only like 30min away.

 

Take it for a test drive with video.

 

So my question is why carbs then? What are the advantages over EFI?

 

We ran 55 DCOE Webers on a 16 valve SCCA GT2 car for a number of years. Solid lifters and all that stuff. IMO 8k on the crank is a bit risky, I'd feel better at around 7800. With our carbs and 16v we were a bit north of 250. Running a 3 liter now with the same carbs and off the the runoffs in Topeka on Saturday.

 

Ease of adjustment and fewer potential failure modes. Other than that I can't think of anything. EFI with a standalone should ultimately provide more power, but with more time invested in hardware and tuning. If its only a small gain than it could be worthwhile running carbs instead.

 

well we all wonder what a 944 with ITBs would be like, this guy essentially did it and took care of fuel metering all at the same time

also with carbs you dont have to tune a computer for the right A\F ratio at 8000RPM. the amount of air passing through will decide that pretty accurately if you set it up right.

 

Nice.

 

i like it...looks mean..

 

Yuck, carbs = epic fail.

 

nice...too bad there aren't more pictures. Also looks like the engine is dry sumped which should be good for freeing up a few more hp, especially if the crank has been lightened/knife-edged

And I can understand why carbs...ease of tuning and reliability - once you get htem dialed in, there's no circuit boards to short out. For all the high tech that goes into racecars, often the best solution is the one that just won't break - especially on a motor as strung out as this one is.

13.5:1 compression isn't impossible on 93 oct - some super bikes do it - but it does mean that your timing and mixture has to be dialed in carefully.

 

OHhhhhhhh.....I raced for 25 years on carbs. They can be reliable, won races all over the world doing so. never had a DNF, just #1's. Hard to beat the sound.

 

probably the only reason it has carbs is because he wanted the shorter runners and velocity stacks but didn't have the capability/budget do go with aftermarket EFI. Another reason would be class rules (SCCA GT2 for example) but it never says anything about racing so I'd rule that out.

Michael Mount has built some high hp engines, I would assume this ad is not BS

 

Very nice, shame there aren't more pictures.

Q. Has the bulkhead been cut and refabricated where the brake booster used to be?

Q. Puzzled by how would you measure MAP with ITB's?

Don't mind the carbs but would prefer these:





Mike

 

You wouldn't measure MAP with ITBs. You could use MAF, but in a full race application it would probably be easiest to simply use TPS. But since this isn't necesarily a true ITB build it doesn't matter since you don't need to measure anything as fuel would already be metered.