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Posted by: BenNC Nov 12 2003, 01:11 PM

I know that it has been posted before, but I can't find it.

What are typical cylinder head temperatures when measured using an under the plug type of sender?

Thanks,

Posted by: cha914 Nov 12 2003, 01:30 PM

I think 350 is about normal if I remember correctly...

Tony

Posted by: Jake Raby Nov 12 2003, 01:31 PM

325-365 is great......up to 400 climbing hills. Not over 425.

Posted by: Lawrence Nov 12 2003, 01:40 PM

400 is cure temp for powder coating. That's gotta be hard on refinished cooling tin.

Posted by: BenNC Nov 12 2003, 02:34 PM

Hmmm, I'm getting just a tick over 400 when I run at 70 (3200 - 3300) for 20-30 minutes. Drops back below 400 when speed drops.

Posted by: Jake Raby Nov 12 2003, 03:50 PM

The engine is out of tune.......Timing is high or you are running lean.

My 180BHP 2316 won't go over 375 with stock cooling.

Posted by: BenNC Nov 13 2003, 01:34 PM

Thanks Jake,

After I check the timing, if it is OK or if the temps stay high after correcting how do I determine if I'm running lean?

BTW: If you're just answering to throw out the phrase "180BHP 2316," then do it again. It sort of makes me feel warm all over.

Posted by: Jake Raby Nov 13 2003, 01:38 PM

LOL.
I was just answering that by saying I'm making 45 HP per cylinder and running cooler than that with a stock cooling system.......

Posted by: redshift Nov 13 2003, 02:11 PM

If you are lean, the engine may hunt at idle (FI? Carbs?) also, you would notice your head temps above normal..

Too much advance.

I run a gear lower than you do at the same speed... I am betting you are over-advanced, if you leave it in 4th, what's the temps? Cooler?

-edit

Ben, have you checked that all of your fins, and the fan, and the tin aren't fouled by leaves or pooh of any kind?

M

Posted by: Jake Raby Nov 13 2003, 02:58 PM

I don't use 5th till 80MPH..... 5th gear kills cylinder heads! not enough cooling fan/engine RPM and too much load for a stock engine!

Posted by: Mueller Nov 13 2003, 03:15 PM

very interesting.....any idea on how much HP is needed at certain MPH in the 914 or bugs??


also, when someone purchases an engine from you (lets say a stocker) do you give them the above advise on the use of 5th gear or about keeping the revs up to increase cooling?

Posted by: redshift Nov 13 2003, 03:16 PM

Yes.

Although I have been a wallet mechanic for all these years, I do know these things like to be driven hard.

A motor lasts longer way @ 4000 than it does at 3000, and it's 100% more fun. (and with injection *JAKE* you can do it 3 times as long between gas pumps... )

Keep up with traffic, it's not a sin!


M

Posted by: Jake Raby Nov 13 2003, 03:43 PM

Over the weekend I went 12 hours one way on 1/2 tank of fuel! With carbs, thats 38MPG at 85MPH.

Posted by: redshift Nov 13 2003, 03:51 PM

Yeah, HigHwAy Star...

Try that on 2 gear streets! HAH!




M

Posted by: vsg914 Nov 13 2003, 04:02 PM

Uh, Jake. 12 hours @ 85mph is 1020 miles. That's more like 127 mpg on a stock tank. How big is your fuel tank?

Posted by: Jake Raby Nov 13 2003, 04:18 PM

I wasn't driving the entire time! LOL
Half the time I was busy blasting by a 64 Ghia and letting him catch up....

Posted by: vsg914 Nov 13 2003, 04:21 PM

Ok, I thought you might have stopped at a rest stop for a 9 hour nap