12 replies to this topic

[paulk 7364]

Hi, just need some advice please if possible.
Ok so I have a stage 1 kit with lcb fitted to my 1275 engine
But the kit is for a 998cc engine.
The problem is do I need to upgrade to a 1275 kit?
I ask because I am upgrading to a stage 3 head shortly
And I want as much power as possible

[Northernpower]

Hi, just need some advice please if possible.
Ok so I have a stage 1 kit with lcb fitted to my 1275 engine
But the kit is for a 998cc engine.
The problem is do I need to upgrade to a 1275 kit?
I ask because I am upgrading to a stage 3 head shortly
And I want as much power as possible

Stage 1 kit means nothing, what you need to do is list what you have in terms of the parts and their manufactures and any modifications, i.e. head ported polished, valve sizes etc.

[paulk 7364]

Stage one needle
Lcb maniflow
Maniflow exhaust
Hiff 44 carb
The head will be ported and polished stage 3 spec
Compression ratio 10-1
Sw5 cam

Edited by paulk 7364, 04 October 2017 - 10:16 AM.

[nicklouse]

well the needle for a 998 will need replacing now, you may well be better with the original 1275 needle. but you don't say what the needle is.

 

you don't say what version size spec the LCB is, but most likely be OK as will the Exhaust.

 

stage 3 means nothing as there is no real definition.

 

whose "stage 3" is it? or what valve sizes ect.

[Northernpower]

Stage one needle
Lcb maniflow
Maniflow exhaust
Hiff 44 carb
The head will be ported and polished stage 3 spec
Compression ratio 10-1
Sw5 cam

The LCB may be ok, what diameter is it?

What type of Maniflow exhaust and what diameter?

The carb will be fine but as Nick says you'll need to change the needle.

You need to be more specific on the head specification. Stage 3 means nothing, who is supplying the head and what specification is it?

How do you know the CR is 10:1

The cam will work.

What are you doing about the ignition?

Budget for a set up on a rolling road.

[paulk 7364]

The head is being made to 10-1 spec
Turbo Phil is making it

[Northernpower]

The head is being made to 10-1 spec
Turbo Phil is making it

Should be a very nice head. What pistons have you fitted and how did you know what cc to make the combustion chamber to give the 10:1 CR?

[paulk 7364]

Standard pistons I believe
Phill said 10-1 would be ok

[Turbo Phil]

The engine is currently10-1 compression. So the new heead will be skimmed to retain standard chamber size after the chambers are modified.

Phil.

[paulk 7364]

Thanks phill answers what I could not cheers

[Northernpower]

You could end up with a very nice engine, what are you going to do for ignition?

[paulk 7364]

Electronic 123 ignition

[Agus1601]

Wowow nice engine and things going on men. I have a very similar engine to you and use the kit stage one offered by mini spares without the rc40 exhaust, It worked perfectly on my 1098cc engine I had before and it now does the job fine. Hope to see that mini on the streets soon.