95opal - Sounds good, that intake is pretty versatile - gear it for what you want. You want all out straight speed, go with the gear that matches your combo, not someone elses. Our cars specs are all different - power, weight, tire height, tranny gearing, and more importantly on how you drive it, etc. As for throttle body, a 65,70,75mm will all flow the same cfm your engine can use. The larger mm, the touchier the gas with same performance. Just take a check on Accufab's website, they got all the info there to back it up. When you swap it over, post up, I'd like to hear your results!
AFR165s and holley systemax, thoughts...
- Thread starter 95opal
- Start date
WHITE94COBRA
New Member
I'm looking for a systemax also, my setup is similar to yours, the opening on the systemax is 75mm, make sure to open up the elbow if it's smaller than 75mm, tecnically you dont need a 75mm tb. I am running a 70mm right now with the edel, but I AM changing it to the 75mm unit once I get the systemax piece, my tuner told me just to get the 75mm since I keep upgrading, he said he could tune it so the driveability is almost stock. I have both tb's and chose the 70mm for driveability; since i'm now pushing more air i'm going bigger.........
5spdgt..... I just got finished bolting the intake on, I just need to run a few vacum lines after dinner and she,s done. I am not going to be swapping gears right away, I will drive it with the 373s and see how it is, if I feel that an upgrade in gears is needed then I will upgrade. Same for throttlebody, I will see how the 65mm is then adjust if needed.
WHITE94COBRA..... I already have the 75mm elbow from the TFS setup, but thanks for the reply.
WHITE94COBRA..... I already have the 75mm elbow from the TFS setup, but thanks for the reply.
WhiteDevil
New Member
Well I was short one plug for the intake, so I will have to finish tomorrow. Im quite interested in the difference between the TFS and Holley myself, so soon as she's finished up tomorrow I will take it for a spin and see how it goes. I was already pretty impressed with the current set up, so anything more out of it would be a
BlackVert
15 Year Member
The car is all set, took it for a ride down the road and back she felt pretty good, but you can definately feel the loss in the lower rpm range. I didnt really open it up to feel how she pulled up top cause it was only a short rip and it was wet out. I do think 410's will almost definately be finding there way into the rear, replacing the 373's. Right now I need the 75mm t-body and get the tune worked out and some other minor stuff I still have hanging around. What really sucks is The TFS was just powdercoated mirror black along with the elbow. So now the elbow has to go back to be powdercoated to match the holley
The car is all set, took it for a ride down the road and back she felt pretty good, but you can definately feel the loss in the lower rpm range. I didnt really open it up to feel how she pulled up top cause it was only a short rip and it was wet out. I do think 410's will almost definately be finding there way into the rear, replacing the 373's. Right now I need the 75mm t-body and get the tune worked out and some other minor stuff I still have hanging around. What really sucks is The TFS was just powdercoated mirror black along with the elbow. So now the elbow has to go back to be powdercoated to match the holley
Yeah a bit of a loss is to be expected, but that intake is very versatile for later mods
Once you decide how you want to drive it, check out some gear calculators for the 1/4 mile if that is what your goal is and get you the closest matching gear to it...If you get a nice flowing brand like Accufab, you will get the same performance with the 65/70/75 mm throttle bodies. Not all throttle bodies flow the same when judging by mm's. If you do the 75mm swap just know that you could have expected the same results with the 65 or 70. 75mm does sound cooler though to those that don't know
BlackVert
15 Year Member
sure, in terms of raw ability to let the air in, all 3 would be sufficient. but since the holley's opening is 75mm, it makes the most sense to match that to minimize the disruption to the air flow. especially since the p-mas is 80. it would make no sense to go from 80 down to 70 and then back to 75.If you get a nice flowing brand like Accufab, you will get the same performance with the 65/70/75 mm throttle bodies. Not all throttle bodies flow the same when judging by mm's. If you do the 75mm swap just know that you could have expected the same results with the 65 or 70. 75mm does sound cooler though to those that don't know
i'd even gasget match it.
Gasket matching is good.
The 'swirl' effect will not effect the flow. Look inside the intake tract of the actual Holley intake. It necks down to less than 75mm anyways. If he is buying straight for a new throttle body, the 75 is fine, but I hope he realizes there is no power difference between either.
It is not what the millimeter is, it is the flow of cfm it allows thru. Both MAF's and TB's flow differently because of obstructions and design characteristics. Take a look at powerpipes/cold air intakes - they all start out big and neck down to the intake - all to increase velocity and cylinder fill.
I do understand what you are saying though
The 'swirl' effect will not effect the flow. Look inside the intake tract of the actual Holley intake. It necks down to less than 75mm anyways. If he is buying straight for a new throttle body, the 75 is fine, but I hope he realizes there is no power difference between either.
It is not what the millimeter is, it is the flow of cfm it allows thru. Both MAF's and TB's flow differently because of obstructions and design characteristics. Take a look at powerpipes/cold air intakes - they all start out big and neck down to the intake - all to increase velocity and cylinder fill.
I do understand what you are saying though
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