Getting ready for an engine rebuild, currently stock with the exception of vmount, DP and RB exhaust.
Mainly going to be a daily where there is lots of curves and MPH of 50 on most streets.
I'm debating on a single or BNR stage 2's, and get differing opinions from everyone I have asked. I want a responsive quick car, between 350 to 400hp, that I can have fun with in the curves, but is reliable and semi gas conscious to be a daily as well.
Thoughts on Moderate single, upgraded injectors, haltech, wiring harness and upgraded fuel pump. Or just Stage 2's, possibly injectors and pump and call it a day?

 

Daily a 25 year old car that eats $500 dollar bills when something needs fixing. Sure why not.

I'm assuming you are talking about RWHP. 350 is ideal for BNR's and 400RWHP is getting closer to the upper range, at that point most people opt for a single.

lol... My FD gets about 24 mph on the freeway while at cruise. All of that goes out the window on surface streets (with bigger injectors).

There are plenty of threads on this subject. Check the FAQ link, tons of info there

But these days most people really like the EFR turbos, very quick response and a very decent top end, IIRC 450+RWHP. Go with an ECU that your tuner is familiar with. Upgraded fuel injectors with fuel rails are a must. Don't bore out your stock ones, it is not uncommon to hear problems from people that get that done. Myself included. Fuel pump: I like the denso, I had issues with the walbro and it turns out I wasn't the only one.

 

When I mean semi gas conscious, I currently drive a lifted Silverado on 35s with a 3in lift. So 12mpg is generous.
IYHO, would the BNR's have a quicker response, no lag when playing in the corners? And I would def. go the correct route with the injectors and rail, not looking to half *** it. I want one and done for a few years, which is why I want as many opinions on which route before I decide.
​​The cost between the BNRs and a single isn't that much diff. So it's about response and reliability now.

 

BNR's set up in sequential mode would have a quick spool. But most who run in the upper range don't have them set up that way because it is tough to control the boost during transition. So they end up with a non-sequential set up and that's not very responsive. Look up the EFR turbos on here and see their dynos. They are pretty impressive.

https://turbosource.com/products/tur...g-turbo-system

 

Thanks

 

You can also look at the 99 twins for response. If you want to make 350hp you can get there all day on the twins. 99 twins will have mad response too.

Dale

 

+1 the 280ps turbos are a big improvement over the regular ones, fast spool, more response, more power, more money too.....

 

If your main concern is just for twisty roads, I wouldn't bother going single unless you like running lower in the rev range. These cars really shine around 300-350whp as too much power in curves makes it a bear to drive and riskier when pulling out of corners just due to the fact the car doesn't weigh anything. I love the stock twins on 12psi. Big single is awesome for straight line, but you have to be a little more throttle sensitive with the EFRs.

 

EFR 7670 would be a blast for canyon runs with a nicer torque curve and equal or better spool. Could also do an 8374 if you wanted more power potential.

 

what else do you need to change to go between those two turbos? i assume they are both T4 foot print, and have the same oil/water hookups. can they use the same downpipe?

 

Maybe slight adjustment of intercooler piping and the inlet. You are correct they are the same footprint.

 

The real problem with the twins for most people is trouble shooting 25+ year old twin turbo control parts, not to mention 50+ feet of vacuum hose.

Single turbo is a no brainer over the twins regardless of power goals, especially an IWG EFR.

 

This is a hard question to answer honestly. A buddy and I switched FD’s for a couple weeks. Mine is 8374 with supporting mods and his is a stock sequential with more boost and supporting mods as well. I really enjoy the hell out of both cars. It’s nice to have the power on tap of the single but if my main goal were the twisties in the canyons, I’d want the twins honestly. It’s much easier to drive, in fact since I’m planning on tracking my car more I’m planning to do another lower power map.