Considering a JRSC for my B18c...


M

Maffy

mmmm EK9
Joined
Aug 8, 2011
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651
I have a b18c'd EK9 and my mate has a dc2, both standard engine internals and running standard p73 ecu's at the moment but we were chatting about getting a supercharger in the near future for one of our motors.

We have i/h/e mods and weren't looking for maaaaasive power really, but wanted a good power increase. Camming the b18c is too costly for us for the gains and neither of us are going to forge our engines anytime soon.

I understand you guys arent keen on sc'd b-series due to compression issues, but would the compression be lower on a b18c than the b16b??

Any help would be greatly appreciated. I have done some research on here and would just like to gather your thoughts on this idea.
 
as far as i know
supercharge needs high compression
turbocharge needs low compression
just letting you know mate hope this helps
 
I was going to do this but I I'm going k instead. Aonghus (vtec6000) has mapped a b16a and it produced something like 250bhp and 175lb torque.I have the Jrsc for sale on reallymeansounds and nihondaownersclub fire me a pm if your interested.
 
Vti-s chris said:
I was going to do this but I I'm going k instead. Aonghus (vtec6000) has mapped a b16a and it produced something like 250bhp and 175lb torque.I have the Jrsc for sale on reallymeansounds and nihondaownersclub fire me a pm if your interested.
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Are you going charged K-series lad, or just going to do the K swap and fund it from the sale of your SC? Thing is, I understand the intake temps problem all too well (306 dturbo history), and I know that it is difficult to make good power with a high compression engine. But I'm wondering has the B18c got a lower CR than the B16B engine. Unfortunatly I cant afford your SC at that money, but good luck with the sale anyway. At the moment its just a thought in the pipeline.

I have heard good stories of Aonghus, I may give him a shout and see what wisdom he can impart with me.
 
You can SC either engine. The b18c is actually higher compression than a b16b but the b18c is the better one to SC because of the piston design(flatter dome)
 
elbuitre104 said:
as far as i know
supercharge needs high compression
turbocharge needs low compression
just letting you know mate hope this helps
Click to expand...

Thats a almost impossible rule to follow lol. There are far to many variables in the equation to keep it that simple ;). It depends on many things but remember that your doing the exact same thing really i.e. positive pressure
 
Maffy said:
Are you going charged K-series lad, or just going to do the K swap and fund it from the sale of your SC? Thing is, I understand the intake temps problem all too well (306 dturbo history), and I know that it is difficult to make good power with a high compression engine. But I'm wondering has the B18c got a lower CR than the B16B engine. Unfortunatly I cant afford your SC at that money, but good luck with the sale anyway. At the moment its just a thought in the pipeline.

I have heard good stories of Aonghus, I may give him a shout and see what wisdom he can impart with me.
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Yea I'm trying to sell my parts to fund my k swap.we can talk on price if you wanted to. I think it would be easier to shift my parts on here but I gotta get my post up lol
 
Rich777 said:
Thats a almost impossible rule to follow lol. There are far to many variables in the equation to keep it that simple ;). It depends on many things but remember that your doing the exact same thing really i.e. positive pressure
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why? can you explain to me cuz my privius engine i build i made it with high compression pistons i was going to turbo it and my tunning shop told me to not the i was going to blow it the i need to used low comp[ression for boost but the i can sc it if i want thats why i end up bulding a new engine from scratch and saling my old one with less then 10kilometers
 
Your increasing cylinder pressure no matter what forced induction you use. High compression pistons 12:1/13:1 are always a no no for boost. Stock compression can be utilized, ussually unless your going to really try to get the blower spinning (under driven blower pulley, oversized crank pulley) stock compression isn't bad. Just make sure you relocate the IAT sensor into the intake mani post blower for genuine intake temps for tuning.
 
elbuitre104 said:
why? can you explain to me cuz my privius engine i build i made it with high compression pistons i was going to turbo it and my tunning shop told me to not the i was going to blow it the i need to used low comp[ression for boost but the i can sc it if i want thats why i end up bulding a new engine from scratch and saling my old one with less then 10kilometers
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Like i say there's loads of variables that need to be considered. What size turbo ? What supercharger ?r IAT's ? What octane fuel is been used ? Whats the application ? ... Here are a few basic things. there's not a basic rule of thumb.
 
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