lumpy at 1.5k onwards guessing game... help...

[Chris Holt]

Okay so here is my problem

The car is hesitating and runs lumpy from 1.5k onwards.

Currently i am bedding the engine in after a rebuild- so turbo not boosting through the engine
she ticks over fine sitting just under 1k at around 14.6 on the AFR

As soon as you accelerate or rev over 1.5k runs horrible.

Has a new dizzy, new roter arm, new HT's, new sparks.. sounds happy as idling so assume the timing is good....(unless i'm missing something..... i am not overly technical just an expensive hobby)

i have done away with alot of the hoses- currently have bleed valve from actuator to base of carb, D/V to aei with a boost gauge via a t-piece- no splits as far as i know.
1.20 main jet with 1.20 air. standard everything else....

i moved the AEI to the scuttle bay and noticed a hissing sound (may have always been there just not noticed, is that right?) AEI can hold a vacuum (the old sucking test)

What could the problem be? or what can i do to find out what it is?

[scratcher]

When you say dump valve to AEI, do you mean it's still coming from the inlett manifold to AEI with the DV and boost gauge T'd off?

[youngscottie]

had the same prob when i fitted a dumpvale years ago
once the d/v opend it would not close affected the idle aswell
but worth a try

check the d/v is closing properly or just remove it
best thing i ever done

[Chris Holt]

When you say dump valve to AEI, do you mean it's still coming from the inlett manifold to AEI with the DV and boost gauge T'd off?

Yes, that's it.