11 replies to this topic

[booton]

A few ask to put mu results up from my rolling road tunning.

i had the car back today.

its a pocketed 998 block with a modified 940 head.
double valve springs and a piper 270.
veneer duplex timing chain.
10:1 compression.

due to a problem with my weber, the standard 1"1/2 SU was fitted, with a new jet and needle. ( Not ideal but need the car ruining.)

the car made 66.5 BHP. not bad with a standard SU on. so happy with that.

he recommed just getting a 1"3/4 should be enough. or might just buy another weber as i had to pay 90 quid for all the parts in my old weber, which can just be swaped over.
will see about that again.

but it really run to drive with the cam in. once i've done 500 miles now i see what it like.
But u can see from the chart he didn't do a power run, just up to 5000 rpm he usually takes them up to seven.
 img017.jpg   901.98K   51 downloads

let me know what u think.

Its not a monster engine, don;t have the budget for that.
this mainly parts i had.
this engine prob cost me 350-400 quid. so for the money i'm very happy and i learn't so much buy doing it.
learn;'t a lot of short cuts and tips along the way.

should see an improvement when i get a new carb.

[johny:)]

i thout glen told me you was hoping for around 90

[booton]

with the weber unsure what it would have made.
but it made what it made. lol.

[coopdog]

with the weber unsure what it would have made.
but it made what it made. lol.

well it wouldnt of gave you 90

[booton]

was hoping for a little more from the engine but thats what it made.
for the money i'm happy.

[coopdog]

was hoping for a little more from the engine but thats what it made.
for the money i'm happy.

think you did alright yeah,
new carb and that should give you a bit more

[AndyMiniMad.]

Thats pretty good for a 998..should get a bit more. (5-10)bhp, if you can rev it up to 6800 or more, the webber wont give you any more than a HIFF44...which in itself is almost to much for a medium spec 998..Was that figure at the wheels or the fly?

[booton]

fly i think. only gave one reading. if i could get over 70 would be great.

[bmcecosse]

Why did he not take it to higher revs? A 998 needs to be revved to get decent power. A weber is way over the top for such a basic engine and the 1.5" would be ok if you 'Vizardised' it - an HIF44 is a bit on the big side - but it will be fine and handy when you upgrade to a 1275..... That power at 5000 revs is fine with that camshaft -was the head modified in any way or just used as is? And thanks for coming back with the results. Did they do anything to modify/optimise the ignition timing curve ?

[booton]

hi. the head is modified from the vizards guide.

he did not take it higher as it a fresh engine.
he did something but i didn't have time to find out to be honest.

but after 500 miles will be going back there.

i have a 1"1/2 that i have done the full vids guide, but i left that one in the house and just brought a standard for a straight forward reference,

didn't plan on it staying there. there carb does have a minisport manifold that takes 1" 1/2 and 3/4 2 and 4 stud so it pretty good. and it has a ram pipe and sock filter.

so it will be pretty easy to chance to a different SU. he recommed using a 3/4 so might do that and sell the weber.

[Bungle]

is your webber not rebuildable ?

just fitted a rebuild kit to my deli's and it's really easy with lots of info on line

https://sites.google...rburetorrebuild

Edited by Bungle, 20 January 2012 - 09:07 PM.

[booton]

something to do with the way its been machined in side. unsure to be honast.