Best thing is to get some nlts logs in to see how it performs while rowing through the gears.

 

I completely understand. I hated the lag of my htagreen on 2.0. had to build a 2.3 for it and I am still not happy you can never have too much spool. had a friend about 8 years ago set out to duplicate my 600whp build. he built the 2.4 first and put in the car with the 14b turbo. the car started boosting at 1800rpm and hit full 20psi at 2100 rpm in 2nd gear! its difficult to describe how much fun to drive that car was pulling away from a stop light. you had to shift at 5200 rpm but that still left the car with an extremely troquey 3000rpm of power. lost of manufactured cars make 400ft/lbs at 1800rpm. it can be done on these engines too. but no one tries. The closest I have ever seen was simon norris build on madmacs car. if i remember it made 400tq at 2500rpm 500tq at 3500rpm and 600tq by redline! someday i would like to be something similar. have been searching on and off on exactly the easiest way to get there.

 

I love my HTA Green..Plenty of fun on the for daily driving,and still enough for track use..I agree on the wishing i had a 2.3 though....2.3,E85 on killmode would be tons of fun im sure....Justin

 

A mate of mine built a 2.4LR and while deciding what turbo to run ran his stock TME 15G on it, and on E85 the bottom end was really strong. Said it was great for driving on the street daily. I tend to feel response as fast rather than power - on E85/BBK Full I was making 50kw more than I am now, and the current setup to me feels faster. If I have to wait for the car to respond to throttle inputs/drive it like a honda keeping it up in the rev range, then I'm unhappy.

 

That's because it was a twincharged car. It had a supercharger for low end grunt. Unless you plan to twincharge your car, probably not gonna get that kind of low end torque.

 

I am aware the car was twin charged. No other way to get both low end torque and high end power. You have to have different mechanical devices to achieve those results. I have been searching the easiest/smartest way to accomplish. Like whether to use a supercharger and turbo, two turbos, or???
I believe I have found a way to do it that is less complex, lighter, and more reliable than the way madmac did it. and give a broader power band. a supercharger does need rpm to move air. so its not the best choice for low end.

 

First post updated with datalogs from the dyno runs. Some rather fascinating info on turbine pressure that caught me by surprise.

 

I'm with you Tim, i'll probably swap out my Green once I max it on E and move to either a 7460 or build a 2.2/2.3 and 7670.

BBKlite on E85 is a very very fun combo.

 

Looks like you need to update your signature.

What are you doing Saturday?

 

Awesome results! I'd say the Green takes my vote.

 

i am on 2.4 7460 combo and it really does not feel like turbo engine at all, on e85 also.

 

i know what you mean. on my 2.4L i really don't think i would "gain" much usable power by going with a smaller turbo. The Black already spools so early it will surge down low, so in a pull for tuning, i actually start my pulls higher. The turbo will spool faster than the engine will accept the way i see it. Moving the powerband left isn't really an option.

also, thanks a ton for the awesome back to back

 

i finally had a chance to do some daily driving with the hta green. off boost below 4000 rpm the bbk has snappier throttle response. i think its due to the bbk responding more quickly to throttle input.

next is that the bbk is able to provide rapid transition into boost by ~3300 rpm while the green seems to be ready to rock at ~3800 rpm. so the only ~200 rpm difference in powerband start on the dyno feels closer to 500 rpm on the street.

another way to put it is that the bbk is ready to rock right at what feels like the end of the natural daily driver rpm (3500 rpm for me) making the bbk feel prefectly suited to either shifting to the next gear for continued off boost driving or slamming the throttle to have a bit of fun. with the green, i have found myself thinking about downshifting to make boost.

since the turbos are so similar in size, i keep thinking that the differences in low rpm characteristics is due to either the antisurge cover or differences in wheel geometries. anyhow, maybe the green will feel more natural after a few more weeks of driving.

 

That 'heaviness' that you describe the green having vs the BBK, is how I feel about the BBK Full vs the Lite. I was trying to describe this to someone, because the power curves aren't hugely different (Full vs Lite) until the topend. But the Lite feels hugely different, but looking at the dyno curves you wouldn't think so. I think rotating assembly mass and aero certainly plays a part with ported compressor housings probably exacerbating the effect.

 

Im actually running both currently. Wasnt much of a fan of the bbk at first but ive been using it on my daily and like it. My other evo has a 2.3 with hta green and that is nasty on e85. Either one u go with you still will have fun with.

My dyno thread https://www.evolutionm.net/forums/ev...519-527-a.html