32 replies to this topic

[Lsurt95]

Hi

 

In the next month or so i will be removing my engine and im wanting to replace it with a supercharged one. However after alot of research i have only found two kits.....the sc12 and the eaton 45 kit.

 

So i have a few questions...

- what results have people had with the sc12 kit as there isn't alot of information about them?

- Has anyone had any problems with either kit?

- i have heard that using the vmax and similar kits have an issue with idle and throttle response?

 

Thanks

 

Liam

[Gr4h4m]

I have an SC12 kit. its a neat looking thing under the bonnet, IMO it looks a lot more 60's and has a very short inlet manifold, but I think to an extent they can all pool fuel a little its just the Eaton has a big slide for it to run down...

 

All of these statements are my opinion from running the charger. since about 2007. This is my fun car.

 

My kit has been reliable but then I have got it to a state of tune that suited me. I ditched the old worn out SU and used a bike carb. 

I think Megajolt or mapped ignition is a must... you can do it on a dizzy but its not very ideal and imo dangerous on points.... as its too easy to go out of tune. plus most of them are worn out... and you don't want the timing scattering..

 

The guy that does the Sc12 kit, also makes a sprintex kit, but the chargers are generally only available new. so a bit more expensive but they are more efficient.

 

everyone will had issues at some point. The reliability is done the the following items:

 

- Your Compression ratio being correct

- the health of your current engine sticking more power on an old smoker won't help

- Ignition timing

- Fuelling

- How you drive the car, drive it like you stole it all of the time something will break, but then it will anyway. 

 

The power on these kits is generally about 40%-60% more than you have now. A lot with all tuning it about how good the head is and then a suitable wide LCA cam, but they will work with a std cam.

 

Any questions on the SC12 I can try and help. I guess getting the charger is getting much harder, try AUS or the US. The kit is was very cheap compared to the eaton but I haven't checked the price or the exchange rate for a while...

[Lsurt95]

well the charger will be on a a fresh 1293 engine which i will be building up over winter. I will be using this as my good weather/ summer car. 

ideally i would run megajolt but it may not be immediately, so i may have to run with an electronic dizzy until then. 

 

what sort of camshaft would you recommend? something like a kent 266 or similar...

 

what sort of power are you getting from your set up Gr4h4m?

 

thanks

 

Liam

[Gr4h4m]

I would use something with a wide lca of about 112. Have a chat to graham russell he does an re13t supercharger spec at 112 lca, you can get them from Keith calver.

I can't stress enough about megajolt or similar they really are a must have with a forced induction engine. Too much timing and your fresh engine will end up with liquid pistons....

The power out of my little 998 is reasonable, I haven't seen a large bore suck through supercharged car higher than the late 130's at the fly. You just can't seem to get the boost without the heat. 10-12 psi is about the max of these chargers.

The megajolt will also give you a simple system control a simple/ crude water injection system from very little money...which helps keep everything cooler.

If you want the ultimate in power turbo is the way forward... But then you will need a serious build either way when pushing high bhp figures..

[coopdog]

you need mappable ingnition,

that should be the first thing on your list imo

get the timing wrong and everything youve done will all be a waste

[Nick Warwick]

I have a Eaton M45 supercharger for sale

[Lsurt95]

well id rather do it right the first time instead of melting my pistons and having to build a new engine 

 

As for power im not too bothered but i would like to see 100+ ponies at the flywheel. what sort of work would be needed to achieve this?

[Gr4h4m]

100 bhp and forced induction is easily achievable without too much of a high spec. decent head, cam and some forced induction 10 psi and you should hit 100 easily 

[firstforward]

Can somebody tell me how much all this will cost, seems like a worked cylinder head and cam are also required to get the performance above 100bhp, and all the set up rolling road costs etc?

[Lsurt95]

Well i done a bit of research into megajolt. The MJ ECU will set you back about £100 and you can get the other parts for around another £100 if you source them yourself. Which isnt bad considering if you are buying a new distributor which will cost about £100 without a coil.

 

As for the supercharger kit iv been looking into buying the manifolds separately for the Eaton m45 charger and sourcing the other parts and fabricating some parts myself. 

 

as for headwork i really cant say but i would expect a few hundred to get around a stage 3? 

 

rolling road costs can be high but i would imagine that anyone going the forced induction route would recommend you get the car set up properly. 

[HUBBA.HUBBA]

well id rather do it right the first time instead of melting my pistons and having to build a new engine 
 
As for power im not too bothered but i would like to see 100+ ponies at the flywheel. what sort of work would be needed to achieve this?

Could easily get 100hp out of a nat asp engine. Mine was before I charged it.

[HUBBA.HUBBA]

I have an SC12 kit. its a neat looking thing under the bonnet, IMO it looks a lot more 60's and has a very short inlet manifold, but I think to an extent they can all pool fuel a little its just the Eaton has a big slide for it to run down...
 
All of these statements are my opinion from running the charger. since about 2007. This is my fun car.
 
My kit has been reliable but then I have got it to a state of tune that suited me. I ditched the old worn out SU and used a bike carb. 
I think Megajolt or mapped ignition is a must... you can do it on a dizzy but its not very ideal and imo dangerous on points.... as its too easy to go out of tune. plus most of them are worn out... and you don't want the timing scattering..
 
The guy that does the Sc12 kit, also makes a sprintex kit, but the chargers are generally only available new. so a bit more expensive but they are more efficient.


 
everyone will had issues at some point. The reliability is done the the following items:
 
- Your Compression ratio being correct
- the health of your current engine sticking more power on an old smoker won't help
- Ignition timing
- Fuelling
- How you drive the car, drive it like you stole it all of the time something will break, but then it will anyway. 
 
The power on these kits is generally about 40%-60% more than you have now. A lot with all tuning it about how good the head is and then a suitable wide LCA cam, but they will work with a std cam.
 
Any questions on the SC12 I can try and help. I guess getting the charger is getting much harder, try AUS or the US. The kit is was very cheap compared to the eaton but I haven't checked the price or the exchange rate for a while...

Graham, what carb are you using?

[Gr4h4m]

I'm not, it's efi now :)

I realised that post wasn't very helpful.

Previously I used a 38mm bike carb, which was much more reliable that the SU.

Edited by Gr4h4m, 27 August 2014 - 08:53 PM.

[megamini_jb]

Has anyone recently done a standard SPi supercharged? Searched on here but haven't seen nothing recent.

Been reading up on it for a while. Sounds good...

"SPI basic supercharger kit
For power figures up to 100bhp the standard ecu and throttle body can be used with a supercharger . This kit suits a standard engine and exhaust manifold , additional power can be gained from a set of hi-lift rockers and free flow lcb and exhaust system(not included), but beyond 100 bhp the standard ecu has trouble coping with demands . This kit will add around 30 bhp to the engine .
parts include :
Modfied supercharger , inlet manifolds , fuel regulator with gauge , Bosch fuel injectors , throttle body, belt, tensioner, and pulley, decompression plate, gaskets, fuel pump, airfilter and fitting instructions ."
£2295

Sorry, didn't feel the need to start a new thread.

Any extra info and advice would be appreciated. Half tempting! Feel it's about time I get more power, but want to stay A series

Ta

Edited by megamini_jb, 29 August 2014 - 09:11 AM.

[Dutchy1978]

I had an SPI and ended up making my own injected kit with 3 injectors, a custom made inlet manifold, intake tube and Autronic SM4 fully programmable ECU.
The one thing I didn't like about most kits on the market is the 25mm hole that the supercharger forces air through. This hole then has to feed 2x 25mm inlet tubes. The maths just doesn't add up to me. Maybe this is why I am not an engineer but I would think that you need to have at least a 50mm hole to feed the maximum air into two inlets of 25mm???

Anyway, there's not much left of the SPI when you supercharge it as you need to change the manifold, throttlebody and injector. If you choose to keep the original ECU then you will never get the most out of the supercharger.

IMO, fully programable ECU for injection and ignition is the best way to go if you choose to stay with injection. Quite a few people go back to a carb as it's what they know or grew up with and can be easier to work with. There is also more info on the websites about superchargers with carbs.

That's my two cents worth anyway.

Maybe someone here has the SPI VMax kit and can provide feedback.

Edited by Dutchy1978, 29 August 2014 - 10:28 AM.