I have ridden in numerous Honda's with B18's and the generic T3/T4E with the 57 trim comp and stage 3 .63A/R. All of the Honda's (no matter what kind of car) didn't feel fast until 4th gear. My theory is that 63 AR exhaust housings are too big for street Honda's or any car with a 1.8liter and smaller.

I have ridden also in 1.6 -1.8 liters with the same T3/T4E turbos but with the 48AR and they felt much quicker on the street. The torque was unbelieveable. Traction was definitly a problem, but they would usually stop pulling hard at around the top of 4th gear which is perfect for 1/4 miler racing.

Give me some feedback, anyone who has owned or ridden in both types of Exhaust A/R ratio turbo cars.

 

I've seen dyno charts on just that, but on a B16. The difference was around 25HP and much more torque at 10PSI. I could get you the exact numbers if you would like. I've read the dyno comparisons in this book and you can check it out at your local borders.

http://search.barnesandnoble.com/boo...84089607&itm=6

 

learn to compare compressor maps from the sticky thread. fyi the 14b is a great match for an ls up to 7k. .41a/r i think.

 

Let me see the dyno numbers you found on the b16 with the 48 and 63 AR's. The 63AR didn't really start pulling until after 75mph, but then at that speed it is hard to tell torque from just going fast.

The 48AR broke the tires loose in every gear except 4th and 5th. It felt very torque'ie from idle to about 75 to 80mph.

Ok, yeah a big laggy 63AR would allow you to gain traction because of the lag and then start pulling toward the end of the race, but what fun is that. If your opponent gets a good launch and has a little power...your screwed.

I say 48AR all the way.

 

screw that i got a big t3/t4e, the bigger the better hah, but its all in what you like, i like lag and then it feels like you turned on an afterburner w/full boost. my friend has a 14b on his d16a6 and he loves it. the car is setup for road race tho.

a smaller turbo may feel stronger on the butt dyno but a larger turbo will own on a chasis dyno or quarter mile. you can really feel torque when in a car, like in a big v8 with tons of torque, the launch kicks you back and feels like the car will tear off the ground. i would rather have more top end, high rpm power with my little d16.

 

I dont have the dyno charts since I don't own the book, I'm cheap, I just go to borders and look at it. I could go get the max hp and torque numbers next time I'm out there. The test was performed on a B16A1 with a T3, I'm 100% sure that the .63 A/R produced more hp and torque.

 

has anybody ran a .42 on there Bseries yet??

 

On which B18 was the T3/T4?
Cause not all are the same.
And a .42 on a B16 will die out fast you wouldn't be able to get the full potential of the engine..it will die out just a few hundreds rev after vtec kicks in it will feel like you let your foot of the gas... and the b16 head flows a lot more air than the any non-vtec b-series/d-series engine so a turbine housinf with A .63 is just right for the B16 and it will give it power to red line.
What is the fun in shifting at 6500 when your engine is able to rev to 8k and after the vtec kick in there is where the B16 makes it''s most power.

 

The car was a 93 Civic CX hatchback with a B18C1 GSR in it. Now again, this was at low boost, I am sure the 63AR shows its power at higher boost levels with the vtec.

I think the combination of the stage 3 and the 63AR is what lags on our small discplacement cars. I also rode in a VW turbo with an HKS GT30 (big turbo) with 28psi of boost and his ---- just felt like a gradual pull like we were just going fast, not the kick in *** feel but more like a 15yr old kid taking mom's grocery getting Civic DX and trying to go 120mph.

I am just saying, for low boost levels, why waste your time with the lag. I have a B18B1 LS engine in my CRX and I am running a T3/T4E with 60 trim compressor stage 2 clipped turbine wheel and a 48AR exhaust housing. I think this turbo will have the best of both worlds.

Again, an awsome hole shot with lots of traction, reaction time, and 60ft will win races at the dragstrip. I have seen 400hp DSM's run 12.5's at a 128mph because they just spin the slicks up the entire track. What good is all of that lag if you have to always play catch up?

 

I have full boost just a hair past 4k rpm with a sc61 with a .63ar ported. I have no turbo lag at all. Is that not soon enough for you? Oh this is on a gsr engine.