Bolt pattern is 4@ 60mm x 60mm. The holes are for M6 with 1/4" hardware just fitting through.
Awesome find! What year and model Volvo is that off of? The other thing is that we need a larger mafs 75mm to go with the 65mm tb. Wondering if that same Volvo has the larger mafs?
I never miss an opertunity to pick on you because you are such a good sport. I'm sure one day there will be a nasty arm-bar waiting for me.
so far this is all just checking online, i haven't had one in hand, but... the one in the pic (previous post) is found on 960 N/A 1995-98 cars, and are 65mm....there are 75mm version also, i'm checking on which specific models had it the 850 N/A 95-98 cars also had 65mm TBs, but the T-plate has a plastic wedge/ramp attached, and when removed the T-plate reveals a hole for the attachment, so a new plate or a N/A 960 plate swap is required....the orientation of the 850 TPS is different also anything post-99 won't work, as they switched to the ETM (fly-by-wire) TBs then ....basically you'd need to swap the TPS (bosch model ...001) for the 348 OEM bosch 004 http://www.ebay.com/itm/THROTTLE-BODY-Volvo-V70-S70-C70-850-TURBO-95-98-AUTO-/310339739841?hash=item4841b0a0c1&item=310339739841&pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr Image Unavailable, Please Login
The 348 TBs (OEM and CNC ported) have been flow tested. I will post the results when I get the data. Rob
they look great Rob, very nice work indeed....i'm sure will be a noticable improvement! sorry guys if i hi-jacked in thread at all...not trying to detract from the OP subject Ernie....i can check on the MAFs if you'd like...what is the bosch # for those?
Not at all, the info is related. OK here we go... OEM 54mm 348 TB = 458 CFM @ WOT / 11 CFM @ closed CNC'd 57mm 348 TB = 557 CFM @ WOT / 10.9 CFM @ closed 22%/198 CFM increase in airflow over stock. Flowed on a Super Flow 600 @ 28" H20. Rob
WOW! That is fantastic, awesome job! You sure do know what you're doing Rob. And to think Ferrari left that much on the table with the stock tb's. My car sure is gonna have an easier time breathing now. Especially since I had the intake runners ported a while back.
I've done three different (style) TBs now. Z32 50mm, Stanza 60mm and 348 54mm. All TBs flowed on the (exact) same machine, Superflow 600 @ 28" H20. Z32 50mm = 350 CFM CNC'd 54mm = 468 CFM 34%/236 CFM increase overall (dual TBs) Stanza 60mm = 534 CFM CNC'd 63mm = 656 CFM 23%/244 CFM increase overall (dual TB on Z32) 348 54mm = 458 CFM CNC'd 57mm = 557 CFM 22%/198 CFM increase overall (dual TBs) I'm glad that my 54mm Z32 TBs outflowed the stock Ferrari 54mm TB's. My 57mm 348 TB outflowed the stock 60mm Stanza TB as well, that makes me feel good. Thank you. Rob
On the contrary, thank YOU. Like I said you really know what you are doing, and I'm glad you were the one I gave my throttle bodies to have ported. Next up - your 355 itb's Thanks again Rob, for an outstanding job.
If 348s have a Map sensor the easiest way to see if these are really an improvement is just look at MAP readings before and after. There was always a big debate among the LT1 crowd whether to switch to a bigger TB on a stock motor, some said yes some said no. Someone had the idea to check MAP outputs and found a bigger TB on a stock motor showed a 3 kpa gain.
LOL well somewhere around here there are some 328s, a few 355s, a bunch of TRs, a drizzle of 456s.....
F355's would be a chore....that's a lotta throttle plates to machine. That said I will probably do mine when the engine comes out. Rob
well ya, sure, you need a real challenge, the 348 TBs were to easy! j/k i know how much work was involved, and added flowbench testing yet.....cudos!
I don't know if that means anything. It is even hard to reliably quantitate these small horsepower differences on the dyno. What seems to be the most reliable is if any changes can lower laptime. If they can't don't bother. I wonder if such an increase 3kpa just moves the bottleneck to a new place, like kicking the can down the road.
