my question is would they give you that much power and would they fit with the gbody downpipe? but for the small fortune that they cost they better be nice.
Dp or header upgrade?
The limit for the stock ported elbow for a long time has been believed to be 11.5 on a IC’d car.
Recently in the TSA class, the “Big Boy cars” have gone around 121 mph with the stock elbow!
Since the TSA class has already run 121 with the stock elbow, it is clear that the bar has been raised, AGAIN! :biggrin:
To run 11.5 in the 1320’s, you will need to run around 117 mph at 3700 lbs race weight which will require around 58lbs/min on the compressor side.
Now, if you study the only HA available turbo upgrade aka TA33, the rating is 43lb/min.
According to "my calcs", this turbo will “theoretically” max out right at 23 PSI on a HA with ported heads and alky.
At this boost level, it should produce around a 12.16/110 in the 1320’s, with alky. (3700 lb race weight)
In summary:
You need a better pipe than the stock unit, but, you don’t need an integral DP for a TA33 as this turbo will be the greater limit in the example above.
It is true that the HA DP has a few more bends than the ID’d set-up, but 11.9 should be very doable with an aftermarket non integral DP/stock elbow.
Your biggest concern at that level will be the PS header.
Hope this helps.
I wouldn't spend that much on headers for any damn car, for that I would buy a number of other things. I could almost buy a HA car for that amount in ok shape.
I agree, they are expensive.
Note: Although you may not be interested in setting any records, it is the price of admission to play in the HA records arena.
The perception of cost vs performance benefit is also the reason there will probably only be one set of these made for the HA cars.
I am confident that ssome of the recent records have not been set with a $300 header / DP system. :wink:
