54 replies to this topic

[jamiestevenbell]

well my current engine spec is

Engine spec

A+ engine
Longman race head 36mm inlet and 29mm exhaust valves and a compresion ratio of 10.9-1
Megajolt 3D mappable ignition with coil, trigger wheel, censors, wiring loom and edis unit
1293 AE slipper pistons and rebore to match
ARP con rod bolts
V-max skart lightened balanced con-rods,
reground lightened balanced crank.
lightened flywheel new cluch
Kent 286 megadyne cam, new followers and double valve springs
Cam belt drive conversion
Minispares 1-3 roller rocker
facet electric fuel pump
vizard'd hif44 carb
maniflow stage 2 lcb
High torque starter motor

All new gaskets and seals
New cam, big end and crank shells and engine bearings
Adjustable oil pressure valve
New high volume oil pump
all new bolts ARP bolts where necessary, stainless steel elsewhere.

Minispeed recon gearbox 3.44 final drive
mini spares xpin diff

its currently producing 81bhp at the wheels and 93atf,

what do you reccommend for my next mods?
i have been looking at specialist components 7port kit. does anyone here have one and would you reccommend one?
im just after advice on where i can gain more power, is the cam on its limit and how many bhp will a hiff44 be suitable for? cheers

[jaydee]

Who did the mixture and timing set up probably got it close. The 286 likes a lot of compression i'd try a 12:1 but then you'll need a stronger gearbox and keep in mind you'll have to rebuild the engine after few thousands miles..

Edited by jaydee, 27 April 2012 - 09:03 PM.

[jamiestevenbell]

chris from smart performance set it up, in all fairness it definatly goes well, i just want more

[Lsurt95]

upgrade to an electric fan instead of the standard belt drive one. you should gain a few horses

[jaydee]

I take it you're talking about leccy water pumps, 5bhp proven, but give cooling problems..

CR 12.1 and it will fly

Edited by jaydee, 27 April 2012 - 09:17 PM.

[jamiestevenbell]

im going to need to fit an electric fan anyway as it get a little warm when sat stationary for a while

[jamiestevenbell]

isnt 12.1 too high?

[jaydee]

I've seen worse..depends on how frequent your planning to rebuild the engine

[Pigeonto]

You're only losing 12 hp between flywheel and wheels?? Whats your secret! 81 at wheels is more like 100 at engine in my experience if you dont have straight cuts. Unless mine is particularly bad. If so you arent doing too bad. Twin Hif 38s made a noticeable improvement for me in comparison with the single 44.

[jamiestevenbell]

hm dont want to be rebuilding my engine after a couple of thousand miles to be honest tho, what power gain should be expected by increacing the cr?

[racingbob]

12 -1 is a lot only for a race car

i had 11-1 in one of my road race engines

using the vizard SPV4 cam

[jamiestevenbell]

lol i was surprised about my losses too and its been on the rollers twice and only had 12bhp losses!

[jamiestevenbell]

what can be achieved with a 286 cam?

[jamiestevenbell]

and whats a vizard sp4 cam?

[Cooperman]

I have a full-on 1310 'S' with 286 etc. The C.R. is 11.2:1 and I use octane booster to prevent detonation. Power is around 115 at the flywheel and I use a SC CR gearbox to keep it on the cam.
What do you use the car for?
If you go for much more power you'll be needing to use a lot of revs all the time which will mean frequent re-building.