Twin Screw back from the dead
no, but we reduce timing for traction in 1st
so is our test car, so far 1000miles no problems
we want to get at least 5k on it before we stamp it safe.
we want to get at least 5k on it before we stamp it safe.
Last edited by Eng@RebelAutoWorxs; Mar 30, 2008 at 05:31 PM. Reason: Automerged Doublepost
Let me elaborate more on Mase's tune here. When he sent me the tune for my testing back in April, my car was pegging my wideband out rich at 10.0 because it won't go any lower. Also, the tune is only running 17* max advance as well IIRC. That is what you guys saw for the dyno numbers he posted, as those are old ones. Plus, he didn't even finish the pull if you look at it, and I can confirm that the blower continues to make boost and power all the way to redline. he has obviously worked it just a bit and brought it up to a better 10.8 A/F ratio.
When I got the blower and tuned it to the tune of a nice 11.8 A/F ratio across the board and bumped the timing up 2* more, the car was a totally different animal. Just by adding a 2* of timing, the car went from 200whp with Mase's rough tune as a base to 272whp on my beloved heartbreaker Mustang dyno. This is where I ran into problems with the twinscrew snout leaking oil and my meth kit checkvalve failing so it dumped 2 quarts of meth into my engine without the kit activated, so I had to stop tuning and about **** my pants, then thanked god my engine didn't blow. Mase has since fixed the snout issue as explained already.
I laid down 197whp with my Injen intake stock on this same dyno. Then I laid down 236whp with all my current mods minus the meth kit and extra timing it allows on this same dyno. I know this dyno rates real low, and it is on average 13.5% lower than the average Dynojet. Here are my numbers to prove it, and check out that extra 100+wtrq I made down low with the 2.6" pullery over stock.
These dynos were done in the cold February time frame.

Then, with the minimal tuning I did get with the twinscrew and no methanol once again I managed to lay down 272whp on the very same dyno. This dyno was done in August time frame and it was really friggin hot and humid in Charleston, SC. I remember it was well over 90* outside and probably even hotter in the dyno area because it's not climate controlled. To top that off, the car had been on the dyno for several hours getting the A/F ratio dialed in, so everything was pretty damn hot to include the blower.
When I got the blower and tuned it to the tune of a nice 11.8 A/F ratio across the board and bumped the timing up 2* more, the car was a totally different animal. Just by adding a 2* of timing, the car went from 200whp with Mase's rough tune as a base to 272whp on my beloved heartbreaker Mustang dyno. This is where I ran into problems with the twinscrew snout leaking oil and my meth kit checkvalve failing so it dumped 2 quarts of meth into my engine without the kit activated, so I had to stop tuning and about **** my pants, then thanked god my engine didn't blow. Mase has since fixed the snout issue as explained already.
I laid down 197whp with my Injen intake stock on this same dyno. Then I laid down 236whp with all my current mods minus the meth kit and extra timing it allows on this same dyno. I know this dyno rates real low, and it is on average 13.5% lower than the average Dynojet. Here are my numbers to prove it, and check out that extra 100+wtrq I made down low with the 2.6" pullery over stock.

Then, with the minimal tuning I did get with the twinscrew and no methanol once again I managed to lay down 272whp on the very same dyno. This dyno was done in August time frame and it was really friggin hot and humid in Charleston, SC. I remember it was well over 90* outside and probably even hotter in the dyno area because it's not climate controlled. To top that off, the car had been on the dyno for several hours getting the A/F ratio dialed in, so everything was pretty damn hot to include the blower.
Hatrickstu, this kit has nothing to do with TAG Racecraft anymore what so ever. Rebel AutoWorxs is run by Mase who worked with TAG Racecraft in the past, but left due to their shady business. Jim and Mase continued on with the kit after Mel at TAG screwed those people over to include your friend. Trust me, Mel is not on my "good side" as far as things go. I am not sure if Mase can do anything for your buddy, but you can always ask. I believe TAG went out of business too which sucks because Canada has a BBB as well.
Wisemanonice, I'm sure Mase is putting the car through it's pases as you can see from the videos he posted. After the issues a couple others and myself ran into during testing originally, he is determined to make sure that is it 100% reliable under all conditions.
Since Mase is now including the tune with it, that will save everyone a lot of time and money. Trust me as I have over 4+ hours of dyno time and countless hours of street tuning to get it dialed in.
Wisemanonice, I'm sure Mase is putting the car through it's pases as you can see from the videos he posted. After the issues a couple others and myself ran into during testing originally, he is determined to make sure that is it 100% reliable under all conditions.
Since Mase is now including the tune with it, that will save everyone a lot of time and money. Trust me as I have over 4+ hours of dyno time and countless hours of street tuning to get it dialed in.
the money issue is the biggest thing here now. Unless harrop raises their price, it will be the obvious choice. Bigger pullies making the same, or more power than the twin screw on a smaller pulley. And it's almost a grand cheaper! From what we're being told right now, the tvs's that are out aren't even being spun that hard, where as I thought the twinscrew was on a 2.9" pulley which was the smallest you could go right?
Props to Rebel for making another choice in the market. but that price is going to have to be more competitive. Plus it sounds like it's a little more work now with the recirculating oil thing and the snout support brackets. I'm a little worried about that. Clutter and stuff in the engine bay and I'll wait to see if anymore mechanical problems arise.
Last thing I want to touch on before getting attacked. I remember seeing some threads about the customer service with rebel. I know 2k5sss/c has had outstanding service. But it seems there were soem other members that had some major problems. I can only hope that those issues are dead.
Props to Rebel for making another choice in the market. but that price is going to have to be more competitive. Plus it sounds like it's a little more work now with the recirculating oil thing and the snout support brackets. I'm a little worried about that. Clutter and stuff in the engine bay and I'll wait to see if anymore mechanical problems arise.
Last thing I want to touch on before getting attacked. I remember seeing some threads about the customer service with rebel. I know 2k5sss/c has had outstanding service. But it seems there were soem other members that had some major problems. I can only hope that those issues are dead.
People keep comparing numbers but both the tvs and twinscrew were dynoed on different dynos. Its not a fair comparison. As for numbers I honestly think the twin screw is a safer set up. Then again we have not seen the full all out version of either. Going to be a hard choice for those upgrading superchargers. Keep in mind, the dyno with the twin screw almost always shows less power then a dyno jet. Good luck to all.


