hi im running a yb in my mk2 escort im looking for between 400 and 500 bhp i want it to be really drivable not to lagy so need some idea of what i need the engine i got is a fresh rebuild im still running it in .i bought this way the guy i got it from said it was built for big hp due to a mild port and polish and low comp,i dropped the sump to look inside its all new arp bolts etc only got it running last week so i thought id check the compression the gauge says 7 across all 4 pots is this low?
spec at the mo is t34 .63 greens stage 3 chip inlet spacer adjustable cam pulleys

 

7 BAR is quite low for sure, it equates to 105psi ish, most engines go for around 10bar as a guide for good compression.
but if it is very low compression, then that would be the reason for low readings.
as long as they are all close to each other in readings (10% norm), then i wouldn't worry too much as long as it isn't breathing heavy or smoking.

 

all readings are the same it has new pistons, rings, bearings the lot

 

Depending on how many miles are on it when you took that reading it may not be that low once fully settled.
If you're looking for less lag then VNT or roller bearing is the way to go, you need to know what cams you have as well, if std forget 500bhp for example.
tabetha

 

cams are stanard at the mo i just need to no how to get between 400 500 bhp ie which cams turbo inlet injectors ?

 

big bank balance or a really nice bank manager

 

Can't be that dear

 

Vnt on a yb? What one would you recommend for above 400bhp?