75 mm Boomba Throttle Body VS stock dyno results
Jul 27, 2009, 07:04 AM
#64
you're an idiot. 65mm TB $250 bucks plus your TB core trade in, if something happen you're fk. Boombaracing $389 without giving your oem TB. Trust me i know about 65mm fail. 1st one it blew up my engine cause the butterfly bolt back out into cylinder number 4th. 2nd time two butterfly bolts was getting loose causing the butterfly to stick, killing our time attack weekend and over $2000 dollars went to waste. 
A oem TB can be had for about $100, so $250 + $100 (core) is still less than the boomba. Who's the idiot now? LOL 
Also, has it been 100% verified that these TB's hold boost? The skunk2 68mm TB looked like such a fantastic unit, but when they put boost to it (an actual boost leak test, not just on the dyno/road) it leaked like crazy.
Jul 27, 2009, 09:16 AM
#67
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Did you guys test the stock tb to see if it had any boost leaks before the dyno? 12hp seems a bit high just for a tb. It's a nice piece, but geez almost $400 for that, plus the dsm adapter at what $40ish then a evo tps. That would cost us dsm guys over $500. Not worth it in my opinion.
Jul 27, 2009, 02:07 PM
#68
Anybody mentioning this idea that a larger throttle automatically makes the throttle "less sensitive" has completely disregarded the throttle linkage system.
Using a "progressive" throttle cable pulley can make a very large throttle body have the driveability of a small throttlebody.
The factory throttle body pulley is a progressive radius pulley. The higher the cord length moved, the closer the radius gets to the throttle shaft and the faster it opens the throttle blade. If Boomba has done their homework, they could easily duplicate the stock 60mm throttle body driveability and power linearity.
Also, some have neglected the throttle shaft in all of this. I believe the factory shaft is 10mm in diameter. At WOT, that throttle shaft is still blocking the airflow path. Saying a 75mm throttle offers no more flow area then a 65mm throttle because the manifold is still only 62mm and is the restriction is wrong. The 65mm throttle still has less flow cross sectional area then the stock 62mm manifold inlet when you include the throttle shaft. If you were to port the manifold to roughly the largest it can get at 68mm, you’d actually have a pretty good cross sectional match to the 75mm throttle body provided it uses the same 10mm shaft.
I'm NOT saying this has anything to do with making power though. This is also negating how the air will actually flow and is just a comparision of cross sectional area. I'm also not suggesting it's better to use a larger throttle then manifold opening and then tapering it back to match the manifold.
Using a "progressive" throttle cable pulley can make a very large throttle body have the driveability of a small throttlebody.
The factory throttle body pulley is a progressive radius pulley. The higher the cord length moved, the closer the radius gets to the throttle shaft and the faster it opens the throttle blade. If Boomba has done their homework, they could easily duplicate the stock 60mm throttle body driveability and power linearity.
Also, some have neglected the throttle shaft in all of this. I believe the factory shaft is 10mm in diameter. At WOT, that throttle shaft is still blocking the airflow path. Saying a 75mm throttle offers no more flow area then a 65mm throttle because the manifold is still only 62mm and is the restriction is wrong. The 65mm throttle still has less flow cross sectional area then the stock 62mm manifold inlet when you include the throttle shaft. If you were to port the manifold to roughly the largest it can get at 68mm, you’d actually have a pretty good cross sectional match to the 75mm throttle body provided it uses the same 10mm shaft.
I'm NOT saying this has anything to do with making power though. This is also negating how the air will actually flow and is just a comparision of cross sectional area. I'm also not suggesting it's better to use a larger throttle then manifold opening and then tapering it back to match the manifold.
Last edited by 03whitegsr; Jul 27, 2009 at 02:10 PM.
Jul 27, 2009, 02:13 PM
#69
We have a 600.0whp / 472wtq stock block Evo VIII with Magnus V5 intake manifold and HTA86 turbo on E85 with a STOCK TB on the car now.
Since we have the BEFORE baseline done already, Anything AFTER will be gains in performance, possibly spoolup, whp and tq.
If Boomba is interested in DYNOTESTING independent 3rd party results on a car that actually needs a larger throttle body, this would be the perfect opportunity to demonstrate what high end of the spectrum gains would be on a car of this caliber.
Since we have the BEFORE baseline done already, Anything AFTER will be gains in performance, possibly spoolup, whp and tq.
If Boomba is interested in DYNOTESTING independent 3rd party results on a car that actually needs a larger throttle body, this would be the perfect opportunity to demonstrate what high end of the spectrum gains would be on a car of this caliber.
Last edited by TTP Engineering; Jul 27, 2009 at 04:25 PM.
Jul 27, 2009, 03:31 PM
#70
We have a 600.0whp / 472wtq stock block Evo VIII with Magnus V5 intake manifold and HTA86 turbo on E85 with a STOCK TB on the car now.
Since we have the BEFORE baseline done already, Anything AFTER will be gains in performance, possibly spoolup, whp and tq.
If Boomba is interested in DYNOTESTING independent 3rd party results on a car that actually needs a larger throttle body, this would be the perfect opportunity to demonstrate what high end of the spectrum gains would be on a car of this caliber.
Since we have the BEFORE baseline done already, Anything AFTER will be gains in performance, possibly spoolup, whp and tq.
If Boomba is interested in DYNOTESTING independent 3rd party results on a car that actually needs a larger throttle body, this would be the perfect opportunity to demonstrate what high end of the spectrum gains would be on a car of this caliber.
Jul 28, 2009, 01:03 PM
#72
We expect to see very nice results.
We will post up and installation and review thread, documenting the install, pressure testing the unit, dynotesting before and after results of the throttle body.
Jul 28, 2009, 01:40 PM
#73
Spoke to Kris @ Boomba today and they will be sending us a 75mm Throttle Body and adapter plate for the Magnus Motorsports V5 intake manifold.
We expect to see very nice results.
We will post up and installation and review thread, documenting the install, pressure testing the unit, dynotesting before and after results of the throttle body.
We expect to see very nice results.
We will post up and installation and review thread, documenting the install, pressure testing the unit, dynotesting before and after results of the throttle body.
Jul 28, 2009, 06:32 PM
#74
Spoke to Kris @ Boomba today and they will be sending us a 75mm Throttle Body and adapter plate for the Magnus Motorsports V5 intake manifold.
We expect to see very nice results.
We will post up and installation and review thread, documenting the install, pressure testing the unit, dynotesting before and after results of the throttle body.
We expect to see very nice results.
We will post up and installation and review thread, documenting the install, pressure testing the unit, dynotesting before and after results of the throttle body.
Jul 28, 2009, 07:51 PM
#75
We are about ready for our aluminum rod race engine to go in, but we will hold out for this test on the stock engine. The head is ready to shoot off the block at this point so this will probably be the last test on the stock block build and likely a world record on the stock motor.