Rebuilding plans for a 1973 911T

[chicagobreezz]

Going to rebuild the 2.4 T engine. What are opinions; leave it stock or modify? With a limited budget ($15K) what should be modified?

[ESully]

What was the original intake type, MFI, CIS, Carbs.
If CIS you can use the 2.7 CIS S cams.

[Eminence Gris]

Leave it stock.

[Richardnew]

Leave it stock. The '73 has great torque. It's probably a better car around town than an S.

1973 911S w/mechanical injection -158 @ 4000 rpm
1973 991T w/mechanical injection - 148 @ 4000 rpm
1973 911T w/CIS - 151@ 4000 rpm

This is from the old Bruce Anderson book.

Remember - Torque is what you drive. Horsepower is what you brag about.

I've thought about modifying mine several times. I'm told to use S pistons and the E camshaft. I might still do it at some point. Not sure why though.

Richard Newton

[popowitz]

Don't modify the case but use high compression P&C's, rebuild the MFI to S specs and twin plug it.

[Richy]

If you modify , you'll be pulling on a thread that won't stop . E or s pistons ,new cams , port the heads , bore the stacks and throttle bodies , buy a new space cam for the mfi pump and recalibrate .If the throttle bodies and pump need rebuilding and the p's and c's and cams are worn , this may be an option .

[37yrold911]

mod it - you will enjoy driving it a lot more

keep stock parts in case a potential buyer someday wants to return it to stock - and all cars will eventually be sold

but the engine is the last thing to address - do brakes first for safety, suspension 2nd, then trans & engine

[chicagobreezz]

It's a slippery slope from a little to a lot $$$. I'd like to find a way to rebuild for reliability, oil leak free, new looking engine and taking an opportunity to increase power even if only slightly.

It's a MFI car.

[gereed75]

I am currently doing a 2.4 T motor in my 914-6. Suggest that you go to the Pelican board and look into the "Supertech Mod S" variant. 9.5 compression with JE, cylinders of your choice, Mod Solex (DC-30) cams. Port heads to 36mm. Yes it is a slippery slope but you can do this variant for basically the same price as stock (except for the new cams and modding the MFI space cam) and easily make 180 hp at the crank.

You can also retain stock appearance.

Good luck, it is an odessey.

[Eminence Gris]

It's a slippery slope from a little to a lot $$$. I'd like to find a way to rebuild for reliability, oil leak free, new looking engine and taking an opportunity to increase power even if only slightly.

It's a MFI car.

Back in the day, I pursued that course with a 2.4 (which is really closer to a 2.3) and took it to 2.7 by opening up the case spigots. It's not a highly obvious modification, but it can deliver a good kick in the pants. Then you're looking at slippery slope items like S cams, heads with 36mm ports, bigger throttle bodies/stacks... etc. At least with a 2.7 S configuration, the space cam exists (RS profile) and you can get the MFI pump set up for it.