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shalco · 03-14-2012, 12:14 AM

Thanks for that, I hadn't considered the problem of the tighter inside radius on the curved plenum.

My car is an older 2.5 so was a cable throttle. I can confirm upgrading to a cable 996 3.4 TB is a big increase in power. I think this starts at 76mm & tapers down to maybe 74mm-ish at the butterfly.

I do have a previously fitted cable 80mm TB. This was an aftermarket ebay Nissan GTR TB. Its a good fit just needed oversized mounting holes, & an adapted bmw iacv plumbed in to the aos take off. It did from memory lack some torque below 4000 rpm compared to the 3.4 TB.

I think I may revisit this set up as I think its a shorter length compared to the 3.4 which means a less angled pipe could be connected.

03-14-2012, 12:14 AM	#93
shalco Registered User Join Date: Mar 2012 Location: UK Posts: 2	Thanks for that, I hadn't considered the problem of the tighter inside radius on the curved plenum. My car is an older 2.5 so was a cable throttle. I can confirm upgrading to a cable 996 3.4 TB is a big increase in power. I think this starts at 76mm & tapers down to maybe 74mm-ish at the butterfly. I do have a previously fitted cable 80mm TB. This was an aftermarket ebay Nissan GTR TB. Its a good fit just needed oversized mounting holes, & an adapted bmw iacv plumbed in to the aos take off. It did from memory lack some torque below 4000 rpm compared to the 3.4 TB. I think I may revisit this set up as I think its a shorter length compared to the 3.4 which means a less angled pipe could be connected.