top mount ET manifold progress

JackieFan · #1 23-08-2007, 10:10

Sounds like a plan

CNHSS1 · #2 26-08-2007, 20:00

confirmed entry for Gurston Down too on sunday 9th september

CNHSS1 · #3 28-09-2007, 09:18

ok sorry to bump old thread, but season is now nearly over (just Castle combe left on oct 20th) and i realise that i never put up power figs even though a few asked.
spec is as can be seen in the earlier pics, basically forgies, steel rods, lightened + balanced everything, autosprint cam, CNH Diy headwork, cut'n'shut DET tubular manifold with external wastegate and turbo technics T28 hybrid.
engine made 282bhp and 266lb/ft at 15psi boost

have the printout from Dave Walkers Emerald dyno (PPC mag tech guy) somewhere if anyones interested.

sideways danny · #4 29-09-2007, 20:32

impressive figures Craig, similar to what I'm going to try to hit but with a few different methods. have you got any idea of the spec of the autosprint cam? I'm chatting to them at the moment

CNHSS1 · #5 30-09-2007, 13:33

not idea on specs really. i took geoff (Mr Autosprint) a Piper one and he based his 'special' on that. it has an asymetric profile ans the one side of the cam lobe is flat. a trick from some of his ford cams apparently. works great tho, breathes much better at high revs but then so does the piper.

PukkaSilvia · #6 30-09-2007, 14:17

That is a very impressive figure at that boost level on a t28 hybrid. Well done.

sideways danny · #7 30-09-2007, 22:50

Quote:

Originally Posted by CNHSS1

not idea on specs really. i took geoff (Mr Autosprint) a Piper one and he based his 'special' on that. it has an asymetric profile ans the one side of the cam lobe is flat. a trick from some of his ford cams apparently. works great tho, breathes much better at high revs but then so does the piper.

I have a piper at the moment and its extreme to say the least but I want to try other things too

i'll have to compare my graphs to yours if i ever get the engine in a car

kennyboy · #8 01-10-2007, 07:25

Quote:

Originally Posted by CNHSS1

ok sorry to bump old thread, but season is now nearly over (just Castle combe left on oct 20th) and i realise that i never put up power figs even though a few asked.
spec is as can be seen in the earlier pics, basically forgies, steel rods, lightened + balanced everything, autosprint cam, CNH Diy headwork, cut'n'shut DET tubular manifold with external wastegate and turbo technics T28 hybrid.
engine made 282bhp and 266lb/ft at 15psi boost

have the printout from Dave Walkers Emerald dyno (PPC mag tech guy) somewhere if anyones interested.

Well done getting that figure with what some consider low boost

CNHSS1 · #9 01-10-2007, 08:58

i just think all the mods are well matched hence the 'low' boost. i think that turning the boost up another 5-8psi wont make much difference as i think the 8v head design starts to become restrictive as S13eater forund out, probably just raise charge temps a fair bit. Great on track though

JackieFan · #10 01-10-2007, 09:25

How did you get on at the last couple of events? I didn't manage to make it to any of them in the end thanks to work and other boring things!