HTA Green DBB testing at English Racing
#48
Former Sponsor
iTrader: (38)
Any thoughts on why both the DBB HTA Green and the stock turbo don't spool quicker on the 2.4L? The reason I ask is that back when I was getting tuned on a Dynojet my car hit 400ft# @ 3700rpm on a 2.0L and original non-HTA Green, whereas yours seems to hit that level at around 3900-4000rpm with 20% more displacement and what is supposed to be a quicker spooling turbo. Are there other parts in your setup that kills initial spool?
#52
Evolved Member
iTrader: (12)
Well in a 3rd gear pull it's 200rpm slower then my 9.8 vIII turbo. If I were to do a 4th gear or add some load full boost would be 500 rpm sooner. I can make it hit full boost at 2900 if I like. The bigger motor helps move more speed on the rollers sooner ware the 2.0 is more gutless which needs more turbo causing the spool to look same or faster then a 2.4. Since it can't make any power and move the rollers till the turbo is spooled up on a 2.0.
Ball bearing turbos allwys shine on transient response(shifts) then initial spool.
The big deal is a turbo that can take a beating and not fail like all journal bearing turbos do.
Ball bearing turbos allwys shine on transient response(shifts) then initial spool.
The big deal is a turbo that can take a beating and not fail like all journal bearing turbos do.
#55
My thoughts exactly. I'm getting my flame suit ready for the repercussions of bringing one of our turbos into this discussion, but I can't help but notice that this EF2 powered stock block car is spooling nearly identical to this BB HTA Green 2.4L, what's all the hubbub about?
#56
Former Sponsor
iTrader: (38)
Yeah I was moreso comparing it to your 478 graph which was E85 correct? Our test car was a MIVEC car so I'm sure that played a part. I certainly understand the benefits in regards to longevity and wear when it comes to ball bearing (we've got our own BB CHRA in the works as we speak) but the spool just hasn't been impressing me on both this and the FP Black testing Tom did (albeit that was an Owen Developments CHRA). Change that cam gear and get this thing to spool at 2900 like Lucas mentioned and then I'll be excited! lol
#57
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Join Date: May 2007
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You better tell Lucas to keep two hands on the wheel at all times. As a budding road course star, he should know better
I also have my radar detector mounted during my closed course runs...LOL...
I also have my radar detector mounted during my closed course runs...LOL...
#58
Evolved Member
iTrader: (29)
Well in a 3rd gear pull it's 200rpm slower then my 9.8 vIII turbo. If I were to do a 4th gear or add some load full boost would be 500 rpm sooner. I can make it hit full boost at 2900 if I like. The bigger motor helps move more speed on the rollers sooner ware the 2.0 is more gutless which needs more turbo causing the spool to look same or faster then a 2.4. Since it can't make any power and move the rollers till the turbo is spooled up on a 2.0.
Ball bearing turbos allwys shine on transient response(shifts) then initial spool.
The big deal is a turbo that can take a beating and not fail like all journal bearing turbos do.
Ball bearing turbos allwys shine on transient response(shifts) then initial spool.
The big deal is a turbo that can take a beating and not fail like all journal bearing turbos do.