upgrades for the RB24S

bjmd · Oct 30th, 2002, 02:55 AM

Hi! I just registered

Just want to seek your help out guys. I'm from the Philippines and my ride is an A31 Cefiro with an RB24S engine ( 2.4L in-line 6 carbed engine). Currently, the engine is stock with 160 hp. I want to increase the hp a bit. Presently, I'm doing the standard I/H/E mods. Problem is, there are no aftermarket goodies available for this engine, so I'm planning to have this custom fabricated. Right now, we're fabricating an intake that would fit a cone-type filter in place of the stock. Any more ideas guys on how can I improve the engine without resorting to engine swap to an RB20DET ? Thanks

bjmd · Nov 14th, 2002, 04:18 AM

Hmm, had my intake fabricated

Just to give info, the RB24 is the carbureted version of the famed RB engines. Some say it is a downgraded Skyline engine, or it's a carbureted Skyline engine, hehe

I'm having a difficult time increasing the power since there are no bolt-on upgrades available. I'm having custom headers and exhaust fabricated for it. Well, the engine is fine by the way, good acceleration, good speed

I've talked to our specialists here and they say they can increase HP by going tri-side (3 carbs). Another option is to do port and polishing of the the cylinder heads, lighten the flywheel and upgrade the pistons and do re-boring. I'd like to ask the people there in US what their opinion is regarding this. I know you don't have much experience in carbureted engines because most cars there are fuel injected. Well, just asking for opinions so that I could have options in improving HP

Forced induction is out because I don't know if turboing a carbureted engine is possible. Thanks

MadSnick · Jul 21st, 2007, 07:01 PM

In the way of upgrades for your engine... Higher CFM Carbs like Holly carbs. Just set the A/F ratio more rich and you'll get some bang for your buck, BTW this is the cheapest upgrade. Or if you wanted to spend a little bit of money, go for the RB25DE head... could have closer to 200/220hp just with the stock ECU. Say, what's the redline on your car? I've heard that the RB24S is very rev-happy.