2.0 911 E bottom end with weber carbs

mnmike · 06-30-2006, 08:48 PM

The guy who had the car before me took a 911E motor which by the specs Ive read has 9.1:1 c/r vs 8.5:1. Could I get much power from this motor with the weber carbs setup (like 150-175 bhp)?

SandyI · 06-30-2006, 10:28 PM

I doubt that replacing the stock MFI with Webers will give you anything more than the stock 140 hp.

To get to 175 HP would involve a total rebuild. And some serious $$$. Probably cost you close to $15,000...

davidppp · 07-01-2006, 02:51 AM

Hello there.

carbs will if anything give less performace than stock injection.

Unless you are restricted by racing class, bigger is always better, and much cheaper.

Howvere be aware that any change of induction or engine etc will greatly devalue any good original car.

Kind regards
David

SandyI · 07-01-2006, 08:49 AM

Stock MFI kicks butt over Webers.
Ask me how I know...

mnmike · 07-01-2006, 03:46 PM

i understood the mfi made more power stock, i guess i was just under the assumption that a carbed motor could be tuned to put out more with these old engines rather than an archaic fuel injection design

mnmike · 07-01-2006, 03:57 PM

how difficult would it be to covert it to mfi? And would it cost a lot?

SandyI · 07-01-2006, 08:52 PM

Not sure how much but nothing with these early engines is inexpensive. This I know from first hand experience as a non-DIY guy. Do you have any early 911 mechanics in your area you trust?

mnmike · 07-01-2006, 09:17 PM

id do it myself, Im not a professional, but i have a lot of mechanical experience of modifying and even doing a ground up on a 68 firebird. Either Id do the modification myself or not at all. I could maybe understand paying someone to tune the car if that was a chore, but getting it assembled would be a DIY (and half the fun). As for cost, I was referring to gathering the parts alone. I think the guy I actually bought the car from might have some of the parts to convert it to mfi, but im not sure what would be missing. Ill email him and then update

kenikh · 07-01-2006, 11:04 PM

Calling MFI archaic is to be poorly spoken. Arcane, perhaps, but never archaic. Why would you ever have a problem with TRULY SEQUENTIAL fuel injection system that can compensate for a number of factors inlcuding barometric pressure and load? MFI is better than carbs: better fuel atomization, great fuel metering, the list goes on. Don't knock it merely becasue it is difficult to work on.

Now for pragmatics. If your car isn't MFI, a 2.0E should be. The fact of the matter though is that reinstalling MFI on any car is EXPENSIVE, time consuming and generally nerve wracking when tracking down the parts. My '69S is being converted back My guess is it is going to cost me over $5000 without factoring the sale of parts from my motor afterward. I have a spreadsheet that is tracking this and it is pretty close.

I'd frankly stick with the carbs unless you have bug for correctness. You'll save a lot of $$$ and time. But then again, you won't have MFI, the coolest induction sytem on the planet!

kenikh · 07-01-2006, 11:07 PM

Regarding getting over 175HP on an E motor: You won't get there without a displacement change and/or a radical change in camshaft. Both would require new pistons. The best bet would be to find some 2.2S P/Cs and a 70.4mm crank. Running E cams, you might just hit 175HP on carbs.

304065 · 07-03-2006, 05:42 AM

Uhh, people who buy 1966 911's don't do it because of the huge power and wide tires, they do it because the 1966 is a time machine to the earliest days of the 911.

My advice to you is to sell the E engine and start looking for a correct aluminum case engine for a '66. What is your VIN#, that will be a place to start.