Engine stops reving around 5500rpm when throttle floored

[eb224]

Hi All,

Wondering if you can give me some idea's around what I should be looking at with a problem I have with my e30 325i. The engine has been stroked out to 2.8l using a M52 crank. It has a branch manifold, Dbilas ITB inlet manfold, Schrik 272/284 cam, E36 M3 3l injectors and a Miller MAF. My problem is that if you floor the accelator it will stop reving quite harshly at anywhere between 5000 and 6000 rpm, but if you don't use full throttle, ie part or mid throttle it revs all the way out to the 7000rpm redline.

I am thinking its got something to do with fuel delivery, in that the engine just can't get enough and have heard that is could be the issue, has anyone got some knowledge on this sort of issue???

Cheers
Leigh

[millyboy]

hey sounds like a big motor .. cool .. hope you've fixed the issues .. but iv been told to change the rotor button but not one with the spring in it .. and also fix the timming becasue my car was cutting out at 5 -6 rpm .. but any way you might need more fuel .. have you installed a fuel regulator and put more presser in it up to 2 or 3 pounds of presure more when u change the cam ..

any way good luck dude

[Rickbmw1984]

throttle position sensor?

[eb224]

The fuel regulator the engine is running is a standard BMW item which runs at 3 bar. The throttle position sensor was an issue initially with the ITB's but was solved quickly, so I doubt its that.