Bosch 650cc injectors

Semi interesting factoid. I have these on my car and at 4 bar base pressure they are spray around 730cc/min, which should be good for 400 crank hp @80% duty cycle

Astroboy said:

Semi interesting factoid. I have these on my car and at 4 bar base pressure they are spray around 730cc/min, which should be good for 400 crank hp @80% duty cycle

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I go lean with these after 6000rpm. But I run my mini with e85, so that might be the reason. Have to pump about 30% more fluid than with normal 98octane petrol.
If new 850cc will not solve my problem, have to insert more powerfull walbro e85 capable fuel pump

DoubleP said:

I go lean with these after 6000rpm. But I run my mini with e85, so that might be the reason. Have to pump about 30% more fluid than with normal 98octane petrol.
If new 850cc will not solve my problem, have to insert more powerfull walbro e85 capable fuel pump

Click to expand...

Are you running these in the stock rail with the stock in tank setup? How much boost @ 6k?

Astroboy said:

Are you running these in the stock rail with the stock in tank setup? How much boost @ 6k?

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Yes with stock rail, tank and 2 year old OM fuel pump. Boost is like little under 19psi 6k.

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Gotcha. Your problem isnt the injectors or the pump, it's the fuel transfer regulator on the filter bucket in the tank. I had exactly this problem. You can add much bigger injectors and map for the drop in differential fuel pressure, but the correct way is to abandon the 'dead head' stock fuel system in favour of a return line setup

Still for sale ? £100 ?

Yes, still in my stash.
120 and those have a new owner

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These are still after new owner

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Bumb. Spring sale. 100€ or place a bid

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These are now sold

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