has any one running a m20 with carbs???
Moderator: martauto
bet it shifts though 
Why do people persevere with carbs? They are out dated technology, with a narrow power range and as stated poor economy. Throttle bodies provide the airflow advantages of carbs but with the accuracy of injection.
To much fuel is as bad for power as too little, any one who cant see that shouldnt be tuning cars!
To much fuel is as bad for power as too little, any one who cant see that shouldnt be tuning cars!
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Fushion_Julz
- E30 Zone Camper
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02 ti carbs are Dellortos
tii runs on Kugelfisher mechanical injection (same system as the E9 CSL and CSi)
On a pure power comparison, slide throttles & injection have a small advantage over carbs, but then carbs are easier to set up, loads cheaper and are better at the top end of the rev scale...
I used to run an 02 on 50DCO Webers... Plenty of other mods including larger inlet valves, ported head, Schrick 300 cam, etc, etc...but I got a reliable 198bhp from that motor (engine still lives and runs in a road car).
Geoff Cook (RIP) used to run an E21 323i in the Kumhos on triple Weber IDA downdraughts....His car was on a par with mine and as good as the 325/327 motors on injection as well as the more standard M3 S14s, too.
Biggest issue with M20s is that the distributor is not adjustable for timing purposes, so you'll need to source the bits for the older M60 motors with the standard dizzy, or construct some sort of spark retardation device.
tii runs on Kugelfisher mechanical injection (same system as the E9 CSL and CSi)
On a pure power comparison, slide throttles & injection have a small advantage over carbs, but then carbs are easier to set up, loads cheaper and are better at the top end of the rev scale...
I used to run an 02 on 50DCO Webers... Plenty of other mods including larger inlet valves, ported head, Schrick 300 cam, etc, etc...but I got a reliable 198bhp from that motor (engine still lives and runs in a road car).
Geoff Cook (RIP) used to run an E21 323i in the Kumhos on triple Weber IDA downdraughts....His car was on a par with mine and as good as the 325/327 motors on injection as well as the more standard M3 S14s, too.
Biggest issue with M20s is that the distributor is not adjustable for timing purposes, so you'll need to source the bits for the older M60 motors with the standard dizzy, or construct some sort of spark retardation device.
1987 Henna Rot M3 (was 195bhp CAT..now more and no cat)
2001 E46 330i SE Touring (manual)
2001 E46 330i SE Touring (manual)
if carbs are better than injection then why do ferrari use downdraught webers?
how does a 2.1 mk1 escort get 11.93 seconds quarter mile (on down draughts) lol
carbs always go out. as did mine, until i got them on rolling road and loctite all the screws
i did an exhaust on a 325 with 3 webers. sounded the nuts, but not as good as some cars i heard with webers. again it all depends on the cam..
this is from my own experience:
THE MORE ADVANCED THE CAM TIMING IS THE MORE INDUCTION NOISE YOU GET!! ALSO THE MORE RETARDED THE TIMING IS THE MORE EXHAUST NOISE IS
anyone who knows how an engine works will understand
how does a 2.1 mk1 escort get 11.93 seconds quarter mile (on down draughts) lol
carbs always go out. as did mine, until i got them on rolling road and loctite all the screws
i did an exhaust on a 325 with 3 webers. sounded the nuts, but not as good as some cars i heard with webers. again it all depends on the cam..
this is from my own experience:
THE MORE ADVANCED THE CAM TIMING IS THE MORE INDUCTION NOISE YOU GET!! ALSO THE MORE RETARDED THE TIMING IS THE MORE EXHAUST NOISE IS
anyone who knows how an engine works will understand
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Kos
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dips has an e21 323i on triple down draughts, it make about 165 with a standard cam and head!!!
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MaaasterBates
- E30 Zone Newbie
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Not quite..........Fushion_Julz wrote:02 ti carbs are Dellortos
tii runs on Kugelfisher mechanical injection (same system as the E9 CSL and CSi)
The 1600Ti and 200/2002Ti ran on Solex 40PHH carbs, the Tii used Kugelfischer mechanical injection and the E9 Coupes used Bosch D Jetronic which was an all electronic set up like L jet but without an air flow meter.
D Jet ran until 1976 and was replaced by L Jet which was better. E9's had the ECU under the driver's seat and all the wires going in were black - nice for troubleshooting!
No M30 engine used mechanical injection except race cars which used either Bosch or Kugelfischer with slide throttles.
Carbs aren't always a waste of time. Dip's 323i set up is nice because it's all brand new and properly set up. 165 bhp is over 20 bhp up on standard because it can breath so much better. I still reckon it'd do even more on throttle bodies but that's a shitload more $$$$$$$
A 285 degree cam and a stock E30 320i head would get that close to 200 ponies - the E21 head is bloody terrible.
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tylerma
- Engaged to the E30 Zone
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MONSTER!!!!!!dips346 wrote:no its down draughts the e21 injecttion set up was shit anyway i will be trying to get this m20 to get over 250 bhp one day on carbs still working on a few idea regarding the block and head yet
they look the f-ing nuts how do they sound?
on my fiesta it sounded mad. propper carby. but the 325 i did exhaust on didnt really sound that loud through the carbs.
most annoying thing is when they go out of ballance. then it starts popping through the trumpets lol.
twin/ triple carbs are the nuts anyway. more the merrier
my cousins mk1 escort is having his trumpets through his bonnet for a laugh. ill take a pic and post it when the bonnet is back from the painters.
you can tune the engine with different size trumpets also. im not 100% sure which way it goes round but something like the longer they are the more top end you get and shorter = more bottom end
how do they sound?on my fiesta it sounded mad. propper carby. but the 325 i did exhaust on didnt really sound that loud through the carbs.
most annoying thing is when they go out of ballance. then it starts popping through the trumpets lol.
twin/ triple carbs are the nuts anyway. more the merrier
my cousins mk1 escort is having his trumpets through his bonnet for a laugh. ill take a pic and post it when the bonnet is back from the painters.
you can tune the engine with different size trumpets also. im not 100% sure which way it goes round but something like the longer they are the more top end you get and shorter = more bottom end
whats it set up for again?
my cousins mk1 escort is set up for drag/show
should do early 12s at the pod.
if i go there tonite ill get a pic and post it.
cant wait til i get a garage so i can build another engine!
my cousins mk1 escort is set up for drag/show
should do early 12s at the pod.
if i go there tonite ill get a pic and post it.
cant wait til i get a garage so i can build another engine!