I have a 91 Na and was thinking about changing out the stock radiator.

In terms of Performance & Speed, Does a aftermarket radiator make a huge difference?

If so, which one is highly recommended?

 

Won't do a thing for you.

 

It's just going to improve your cooling system.

 

More capacity = better cooling but more weight

Better cooling is good, more weight is bad.

6 of one or half-dozen of another.

 

The OP doesn't even mention his temperatures running high ; assuming the post wasn't dumb enough to leave out this vital information, a bigger radiator will do nothing in terms of performance or speed. Contrary to popular belief, just throwing on a bigger radiator on a car running within normal operating temperature will not make it run any cooler.

No cooler ; no faster ; no better performance.

 

get the Koyo dual core with a 13lb cap and don't skimp on the new hoses either. It'll improve the peace of mind for the big nut behind the wheel.

 

Someone asking about the benefits of a new radiator is not going to be driving at the level where he notices 5lb more on the front end. In this case, cooling > performance because that weight savings will get you a couple of tenths at most.

 

I have no problem with cooling. The question was strictly based on performance improvement.

 

I have been reading about the Koyo radiator. I think that might be what I go with in the future. I appreciate your suggestion.

 

I have been reading about the Koyo radiator. I think that might be what I go with in the future. I appreciate your suggestion.

 

I think the answer is actually a bit backward.

In example, if you have a TII, and if you were to go FMIC, then you'd be interupting the amount of air going through the radiator. So you'd then need a radiator that does a better job with what air flow is left available to it for cooling. That is where the performance value of a Koyo comes in my opinion.

Said differently, if you do modifications for speed and performance, then an aftermarket radiator like a Koyo makes a difference in compensating for that modification so to maintain proper engine temps and you don't pop your engine. So the Koyo helps you keep what speed and performance you have.

Bottom line, the expectation is that a Koyo is simply more efficient cooling water, but it won't make the water any cooler than the engine system is designed to run or make your engine put out more power than the set up around it is designed to put out.

 

5lb won't get ya a couple tenths...lol

 

Thanks John.. That is a great explanation. I am guessing that I really don't need to upgrade to a Koyo radiator since my only real speed and performance mods have been a true daul RB exhaust system and pineapple sleeves. I think I should be fine with the stock radiator.

 

If you need to replace the radiator because your existing one is failing, it certainly doesn't hurt to upgrade for those few dollars more. Your wankle will thank you for that bit of over engineering.

 

just make sure to use the proper brackets and not have your aftermarket radiator held in place with zip ties like most 7-owners.

...DCrosby

 

Will do. Thank you

 

My V-Mounts were poorly designed, and the Seller at the time stood by his flaws and replaced them for free... unlike whomever did that paint job on the Ronald McDonald Racer, nobody fixed that, you had to sell it as I recall !

 

aftermarket cools better, and changing the old one out for a nice shinny one isnt bad at all. but if your car was modded it would be best to change out the thermostat to the temp you want it to run...

ps for stock application i would suggest the dual pass

 

Wow! That foo must be a RE-tard! faking the funk!