Engine: 2.1 Carb B21A: - Twin carbs

foggyjames · Jan 7th, 2010, 03:16

Bit late to the party here...

As Dai says, my 360 measured 140bhp and 145lbft (calculated fly figures) on a dyno with just a pair of 40s and a K cam. The B21 ought to make a bit more anyway, plus a performance exhaust would free up quite a bit. That engine is now in my 1981 343.

The tuning is less than ideal...but that is in the progression stage. It needs different emulsion tubes...or the existing ones altering. It's not bad enough that I've bothered to pursue it in 4 years, though. Once you've got the revs up a bit, wide open throttle is tuned pretty accurately...so that peak horsepower figure is reasonably good for that setup. Bear in mind the standard exhaust is not exactly a performance item. That and some headwork would see 170-180bhp I reckon...oh...and probably some larger chokes for the carbs...the original R-Sport spec was for 32mm chokes!

Don't discount the Solexs. Webers and Dellortos are heavily scene taxed, and I haven't suffered for having the Solexs.

Economy was circa 25mpg at 70mph...not *that* bad. It's very civilised to drive, actually.

And it's worth every penny for the noise...
http://www.youtube.com/watch?v=LLFttupRXJM

cheers

James

Jan 7th, 2010, 03:16	#19
foggyjames 300 Register Keeper Last Online: Jun 20th, 2024 00:00 Join Date: Dec 2001 Location: Nottingham	Bit late to the party here... As Dai says, my 360 measured 140bhp and 145lbft (calculated fly figures) on a dyno with just a pair of 40s and a K cam. The B21 ought to make a bit more anyway, plus a performance exhaust would free up quite a bit. That engine is now in my 1981 343. The tuning is less than ideal...but that is in the progression stage. It needs different emulsion tubes...or the existing ones altering. It's not bad enough that I've bothered to pursue it in 4 years, though. Once you've got the revs up a bit, wide open throttle is tuned pretty accurately...so that peak horsepower figure is reasonably good for that setup. Bear in mind the standard exhaust is not exactly a performance item. That and some headwork would see 170-180bhp I reckon...oh...and probably some larger chokes for the carbs...the original R-Sport spec was for 32mm chokes! Don't discount the Solexs. Webers and Dellortos are heavily scene taxed, and I haven't suffered for having the Solexs. Economy was circa 25mpg at 70mph...not that bad. It's very civilised to drive, actually. And it's worth every penny for the noise... http://www.youtube.com/watch?v=LLFttupRXJM cheers James __________________ VOC 300-series Register Keeper '13 V70 D4 SE Lux '89 740 Turbo Intercooler '88 360 Turbo Intercooler '84 360 GLT '81 343 GLS R-Sport '79 343 DL '70 164

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