JB4 + mods =

[GennyGuy]

Appreciate the input my guy. So just touching or shy of 400 whp is pretty solid on map 2 and reliability with it. I would be using a mustang Dyno jet when the time came around so more optimistic. So you can run map 3 on 93 pump ? Didn’t quite catch that .

I think this estimate of power is accurate. Personally, I think you'll have a better understanding of your cars power if you pay more attention to trap speed. There's too many variables with dynos which is why people keep mentioning which one they had to run the car on, etc. Focus on what your car traps and you'll know if you can win or not. You'll know if you're fast or not.

Also, I think 93 was Map 2. Map 3 I believe is once you start running blends up to E30? 1st post breaks down the maps. Here's the link:

Kia & Hyundai JB4 - JB4tech.com - International Turbo Tuning Discussion

Kia & Hyundai JB4 Kia & Hyundai Turbo

www.n54tech.com

 

[Brichinelo]

I think this estimate of power is accurate. Personally, I think you'll have a better understanding of your cars power if you pay more attention to trap speed. There's too many variables with dynos which is why people keep mentioning which one they had to run the car on, etc. Focus on what your car traps and you'll know if you can win or not. You'll know if you're fast or not.

Also, I think 93 was Map 2. Map 3 I believe is once you start running blends up to E30? 1st post breaks down the maps. Here's the link:

Kia & Hyundai JB4 - JB4tech.com - International Turbo Tuning Discussion

Kia & Hyundai JB4 Kia & Hyundai Turbo

www.n54tech.com

Well revisions have been made to the JB4 including things that are included with it like the fuel wires . And I’ve heard of other ppl running map 3 as well with just 93. Like @StingerbyAdoom said if the logs are good I would procedd . If not I’m fine with just map 2

 

[keplaffintech]

For those who dyno'd their map 2 at 440whp, what was your stock dyno? I'm hearing all sorts of dyno numbers from map2 (380-440) so providing stock numbers to compare would help.

 

[Brichinelo]

Secondary downpipes were claimed to be good for ~15-30 whp (IIRC) when they came out, but afterwards, with a tune, it didn't seem to make much difference (i.e. after tuning, same power with and without pipes). IIRC, some people have snapped turbo studs when doing secondaries, which was a HUGE PITA.

IMHO, avoid, the headache, do catback ONLY if you want sound (again, minimal gains), and do the BMS 450 WHP package.

This car is NOT like turbo cars from 15 years ago where exhaust is a huge restriction for ANY tuning level. You probably only want to do pipes/catback after doing intakes, tune, plugs, and even then, probably minimal gains (like 20-30 whp, but when you're > 400 whp, is 20-30 worth it for $1K+?).

So secondary downpipes have known to be problems tuned or not? If you have the downpipes installed professionally you could avoid an headache. If I did get secondaries it would be simply for the sound paired with whatever exhaust to make it louder.