Anyone have any info/knowledge of advantage of single vs. dual blade throttle body for GT? Slight difference in retail price. Any available?
Accufab Throttle Body
- Thread starter TACHY
- Start date
Beach-GT
GT Owner
Slightly higher flow rate but then slightly less velocity. Probably equal performance in the end. Will let larger chunks of airfilter thru. :lol
Fubar
Totally ****** Up
I've got one and will test it shortly. I've got the baseline, I've changed injectors and have had good results with that but I need to do some fine tuning on before I give a realistic review. Then I have to do a modified airbox comparison... THEN I will do a single blade throttle body dyno run for comparison. It may be a few weeks until I have all the data in.
Rockstar may have a better idea of what the new TB does for power.
Rockstar may have a better idea of what the new TB does for power.
- Aug 25, 2006
- 4,436
John aka AccuFab called me yesterday and we chatted about several things including the results that both of have had with his new single blade throttle body.
John has seen significant gains, meaning those estimated in the range of 30 HP on the big end with one of the drag trucks and on my end I have found that it installed and operated with no issues however have not pushed a gal with one on yet however suspect that on the big end particularly with the Whipple gals that there is a number in the range of 10-15 that will be unleashed.
Now as for the loss in velocity on the lower end based on the single blade design; there is no issue with this on the supercharged gals whereas on a normally aspirated gal the situation would be different.
The bottom line is that whether an AccuFab single blade or the original dual the product IMO is of the highest quality, a gorgeous CNC billet aluminum assembly that is a pleasure to look at, and they operate with no issues; aka perfectly.
Takes care
Shadowman
John has seen significant gains, meaning those estimated in the range of 30 HP on the big end with one of the drag trucks and on my end I have found that it installed and operated with no issues however have not pushed a gal with one on yet however suspect that on the big end particularly with the Whipple gals that there is a number in the range of 10-15 that will be unleashed.
Now as for the loss in velocity on the lower end based on the single blade design; there is no issue with this on the supercharged gals whereas on a normally aspirated gal the situation would be different.
The bottom line is that whether an AccuFab single blade or the original dual the product IMO is of the highest quality, a gorgeous CNC billet aluminum assembly that is a pleasure to look at, and they operate with no issues; aka perfectly.
Takes care
Shadowman
Rockstar
GT Owner
BlackICE
GT Owner
zrchris
GT Owner
Yes it was, but keep in mind it was at ~25 psi of boost and along with other mods (intake box, fuel system). At 20 psi I agree with Bill that the projection is 10-15 rwhp over Accufab twin But the twin at 20 psi is probably worth 20-30 hp over stock.
Fubar
Totally ****** Up
zrchris
GT Owner
I don't have any measurements myself but some say that an Accufab twin is worth 10 hp over stock TB with a stock SC. If true I would easily believe 20 hp over stock with a 4.0 whipple at 20 psi. Bill should know?
Rockstar
GT Owner
Yes they were both Accufab throttle bodys with a lot of other mods. So naturally you should have a higher increase in HP. Everyone will experience diffrent results.
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Chris A.
GT #32
- Aug 25, 2006
- 4,436
Chris A; your gal is a "beast" however to answer your question; yes
Now having said this I would encourage in your case that the considered funds go into the Maserati fund
Shadowman
Chris A.
GT #32
:bored You know me toooo well Mr. Shadowman
:frown Feel like I just got caught by my parents doing something wrong
:frown Feel like I just got caught by my parents doing something wrong
T body
From the testing we have done so far (with the new single blade t-body) we have seen 12rwhp improvement from a stock supercharger, Accufab dual blade t-body, 2.7" pulley car. What is more important than that is it dropped 22 degrees in IAT2. More testing in still in progress.
We have reworked the tune to help with the part throttle and tip in conditions as well.
From the testing we have done so far (with the new single blade t-body) we have seen 12rwhp improvement from a stock supercharger, Accufab dual blade t-body, 2.7" pulley car. What is more important than that is it dropped 22 degrees in IAT2. More testing in still in progress.
We have reworked the tune to help with the part throttle and tip in conditions as well.
- Aug 25, 2006
- 4,436
Very cool Rich...... could that be your gal being methodically massaged for yet another wonderful season of being exercised?
To the HP gains I cannot speak as dyno readings on any given day can have a greater spread than 12 HP however how would going from a dual blade throttle body to a single blade throttle body drop the IAT2 temperatures aka discharge air temperatures?
Thank you for sharing
Shadowman
Kingman
GT Owner
BlackICE
GT Owner
Throttle body
Yes and thank you that is my car. As it has only been out once this year due to work loads and our unually wet year so far. From we have seen on other cars (non GT's) when you put on a single blade throttlebody two things happen. Obiviously increase your cfm (let more air in) and secondly without the restriction of the "divider" in the dual blade throttlebody it decreases the turbulence and SLIGHTLY lowers IAT2 temps.
WOW, I thought I could get better than that. This test was done on the same day about an hour apart with testing the dual blade first and then the single blade. So actually the engine had an hour to heat soak. Yes as we all know temp is the greatest factor in constant HP on supercharged cars that is why we try to be as consistant as possible during testing. Same car, same driver, same dyno, same fuel, same as much as possible.
Yes and thank you that is my car. As it has only been out once this year due to work loads and our unually wet year so far. From we have seen on other cars (non GT's) when you put on a single blade throttlebody two things happen. Obiviously increase your cfm (let more air in) and secondly without the restriction of the "divider" in the dual blade throttlebody it decreases the turbulence and SLIGHTLY lowers IAT2 temps.
WOW, I thought I could get better than that. This test was done on the same day about an hour apart with testing the dual blade first and then the single blade. So actually the engine had an hour to heat soak. Yes as we all know temp is the greatest factor in constant HP on supercharged cars that is why we try to be as consistant as possible during testing. Same car, same driver, same dyno, same fuel, same as much as possible.