2.4E MFI stacks on 2.2S MFI?

rswannabe · 04-11-2004, 08:35 AM

I have a 1970 2.2S with factory MFI setup. I'm thinking of sending my throttle bodies out for rebuilding. Could I run 2.4E throttle bodies and stacks on the 2.2S in the meantime? Will they work with the 2.2S system? Thanks.

Tyson Schmidt · 04-11-2004, 10:22 AM

It would work, but you'll need to temporarily adjust the rack to compensate for the different breathing characteristics in the mean time. Note how many clicks you go each way on the main and idle racks so you can put them back after you get the S t-bodies back.

KevinG · KevinG's Garage

RS -
I found out after about 9 months of ownership that my 2.2S was using 2.2E stacks and TB's. Seems the previous owner was too cheap to pay for a rebuild on his very worn out 2.2S throttle bodies, and put on the 2.2E stuff instead. Luckily for me, the original TB's and stacks were in the 'box of old parts' that came with the car.

Your car will still be drivable, but you will notice a big difference once the rebuilt S stuff is put back in. Eurometrix did a great job with my TB's. They were kind of slow, and definitely not cheap, but worth it just the same.

rswannabe · 04-12-2004, 07:42 AM

Thanks for the info. I though that was the case, but I just wanted to be sure.

KevinG - How long did Eurometrix take to rebuild you TB's and how much did they charge you?

KevinG · KevinG's Garage

RS -
I think it was about 5 weeks and around $750.

Scott Clarke · Scott Clarke's Garage

RS-
What if you send the E throttle bodies to Eurometrix, and have them convert them to S spec? This costs an additional $100. You could then sell the S bodies for more than the difference in price. You might be able to make some money, and you would'nt have to drive a car aroud with mismatched components. Matt's turnaround time is about a month right now.
-Scott

rswannabe · 04-12-2004, 01:18 PM

Hmmmmm. I like the idea Scott.

OK, another question. Other than the fact the the 2.2S stacks are alloy and the 2.4S are plastic, are there any other differences? Are they sized/ported the same? Cams and ports in the S heads are the same, so I would assume that the stacks and throttle bodies would have the same dimensions as well.

Scott, do you think the stock 2.2S MFI system would work well with a 2.5 or 2.6 short stroke? Would I want to port the stacks and TB's to work with the larger diplacement? Will I have to upgrade to a 2.4 MFI punp and RS space cam?

Thanks again.

Zeke · 02:11 PM

Search for posts by Bobaloo containing MFI. At one point, I believe he posted a chart showing all the differences in the bores from model to model. There are a lot of differences from year to year and T, E and S. Each pump is different as well. Tyson knows his suff and TLG does too. But Bobby has the written info.

Edit: Sorry, that's Bobboloo. I couldn't get back here to edit. Some server problems somewhere.

Zeke · 04-12-2004, 02:18 PM

Here it is.

rswannabe · 04-12-2004, 02:27 PM

Good stuff. Thank you.

Scott Clarke · Scott Clarke's Garage

RS-
They would work quite well with a 2.5 or a 2.6. They worked well in the 2.7RS, so you could expect them to be fine in a short stroke motor. The limitation would be RPMs. As long as you were using the S cam, it would work nicely. A more radical cam might benefit from larger ports and throttle bodies.

The pump should work, given some mixture adjustment. Gus Phister told me that in addition to mixture adjustment, some internal adjustments can also be made relatively inexpensively (not a space cam change).
-Scott