100rwkw out of a N/A 3TC. Is it possible for sub $1k?

[oldeskewltoy]

The stock head flow quite poorly considering it's a hemi design.In fact the head would be the limiting factor since it flows just enough to make some 135-140 hp.Proper seat/valve shapes go much higher and even moderate port job take it around 165-170 hp potential.Above that the physical dimensions come (the outside widht of the port is ~40 mm so 36 mm port is...)
Proper headwork,sidedraft carbs and some moderate cam are the order.

add proper pistons.... and 135hp isn't so hard

[Hurricane]

look on 3tcgarage.com for some really good advice also.
stock rods and pistions will hold plenty of power.
push rods will not fail.
new valve springs and a regrind cam will make a good diference.
i just sold new dual springs for $120 and my cam reground only cost around $120odd.

you will beable to add a few more items to the current build for $1000. my whole n/A 3tc only cost me about $1500.
(i did alot of work) sus my link below to see all my motor specs. (no idea on power).
main issue i had was the point dizzy, never liked higher revs (about 8k mark)

i would add cams, springs, elec dizzy and msd 6al box, deck the block and head and retune. i beleave all this could be done for $1000. aleast it only cost me about that much (some 2nd had parts needed, eg; elec dizzy and 6al box)

will you get 100rwkw? i dont know for that price, but you will get some good gains

turbo is alot easyer to make power, but you might be looking at more than 1k also.

the stock 3tc bottom end will hold alot of power though. 30psi is the most ive ran and not blown a motor apart. (did melt a pistion)

my current 3tc holds no oil pressure at idle due to being old and worn out, but has held 10 - 15psi of boost daily driven and thrashed every 3rd day for the last 2 years.

if you kill a 3tc bottom end you doing somthing wrong hahaha

[JustenGT8]

add proper pistons.... and 135hp isn't so hard

OP wants that at the wheels, whole other ballgame

[brucey]

wow 80rwkws is pretty good for a standardish 3TC. Looking in the xT-series dyno results it's around the same as a modified 3TG:

http://www.toymods.org.au/forums/dyn...-variants.html

For an extra 20rwkws, could start with improving the head flow, since the inlet port cross-sectional area is smaller than the valve throat area. It's limited due to the width of the port with the pushrod holes. Also there's holes underneath the floor of the inlet port, which restrict how far it can be enlarged. A flow of ~200 cfm @ 28" of water for the inlet port with 1mm oversized valves seems to be as far as you can safely go without welding the head.
The flow of a 2T/3T head can be significantly increased with porting:



Could do some porting yourself if you have a die grinder, a set of burrs for aluminium, sanding rolls, flapper sander rolls etc.

Then regrind the camshaft and resurface the cam lifters. Wadecams were pretty cheap compared to others (~$100), but have gone out of business. Might need stiffer valve springs as well.

[MorGo]

To port a 2T the first thing is to remove the valve quides;if not the porting is impossible (at least that it would be anyway benefical).The quides must be modified and since no quide is consentric (or if then reinstalling them they are not consentric with the seats) the seats must be cut.
And proper seats are essential!! Stock seats are well,just stock.Don't even dream a well flowing 2T with stock seats.And modified valves.

Where those flows are picked? (seem quite correct)

[brucey]

To port a 2T the first thing is to remove the valve quides;if not the porting is impossible (at least that it would be anyway benefical).The quides must be modified and since no quide is consentric (or if then reinstalling them they are not consentric with the seats) the seats must be cut.
And proper seats are essential!! Stock seats are well,just stock.Don't even dream a well flowing 2T with stock seats.And modified valves.

Where those flows are picked? (seem quite correct)

It's actually your data I got from here:

http://www.toymods.org.au/forums/tec...ies-heads.html

[MorGo]

no wonder that they look real numbers..

[SHEPPO3930]

do you really want a fun NA car that makes the right noises, or 100+rwkw?

if you want power, turbo it. a low boost, non-intercooled, draw through set up will get you 100rwkw easily.

or just port the head, up the comp as much as easily possible, and go for some NA fun and don't worry about the dyno figure. if you want it to make 100rwkw on the dyno, just play with the correction