ok im looking at getting a new motor for my st. im looking at the o.s. .18cvr and the o.s. .18tz. the tz is a faster motor but how much faster will it go than the cvr? thanks for your help.

it doesnt go any faster

it is how you gear it that will make it faster but with more power you can get a smaller spur gear or bigger clutch bell gear or bolth

so what is the difference between the tz and cvr than?

the tz will have alot more power so then you can gear it higher and therefor go faster but i bleave that the rpm is about the same

the tz will have alot more power so then you can gear it higher and therefor go faster but i bleave that the rpm is about the same

what is more important to you... top end, or low end?

it will most depend on the exhaust manifold you allready own as the 18TZ is a rear exhaust and the 18CVR is a side exhaust .
After you will get more power with a TZ but all will depend on the gearing for the best speed.
I have the 18TZ in my RC10GT and to be honest i have to reduce the throttle % from my radio ,from 100% to 70% in order to not flip the truck over all the time at the end of the straight line , the speed is really stupid fast and the car becomes allmost uncontrollable ...

i want more top end the i do low end.

The CVR in a 1/10 truck is more than enough power. You'll find with the TZ it's just too much motor. I have the CVR in my XXX-NT and it's just stupid fast...

Then the 18 TZ will give you more top end ,at least that's what i experienced with mine .
The only thing is that you will need a specific manifold if you do not have a rear exhaust manifold .
here is a pic of what it look's like mounted on my RC10GT with a THS inline exhaust that i found to be perfect with that engine ,it give's it a tremendous amount of top end .

I agree , the TZ is just too much for a 2wd truck . Also if you plan to race , most tracks will not allow .18 engines .

and its getting to the point to where if you wanna race... start looking into 1/8, well at least where i live

1/10 gas truck is a very fun class .

I'll second that [&o]

and i will 3rd and 4th... but as we all know its fadeing out to buggy/truggy

im just hoping that in a few months the price a fuel will go back down a couple of bucks and some of my friends will start back up with there st's. they went onroad about a year ago and arnt doing to well and not having as much fun... they get me into racing 1/10 and then switch... HA[:@] oh well i guess i just like being dirty..

any north-western washington guys race 1/10th st let me know and i would love to go driving with ya

Gas truck will make it`s cycle around again . 1/8 was big 10-15 years ago and then died out and been coming back the past few years .

That would be me for one, though I live in OR. You race at TRCR? Area 52? Church of Dirt? Yeah, 1/10 is on a big decline. What really sucks is that Peel-It closed. That was my favorite track for winter racing!

You should consider racing the NCT. I realize the races are far away, but you get some of the best competition in the USA! Gary Culp and Taylor Peterson, among others, could A main at just about any national level race.

An 18tz in a ST? Sheesh, I can't control my AD2 with a 12tz. An 18 is nearly incomprehensible! As if anyone could need more power, an RB V12 is ever so slightly more powerful than the tz... IMO of course.

This is why you get a os .18 tz it has a dyno 2.28 hp and 5 ports and you can find it for $165.00 the rb v12 is $325.00 and has 3 ports find me a dyno i dont se how it can have more power a highly modded 3 port and 30% smaller i t can have more power hope it would for $325 but i just dont think it will top 2.28 hp

the 18tz with a 5port is not race legal and thats why i think it would be much cheaper then and .12 3port

yes i know the .12tz comes in 3 and 5 ports for around the same cost. one is legal and one is not (i think) depending on where you race

the .18 cv-r is $109-129 at hobby town... more then enough power for all 1/10th truck

so your paying for the for it to be legal

the .18tz is for outlaw class & making the fastest car in your group throw a rc10 24 tooth clutch bell with a 51 tooth kevlar xxxnt spur and you are getting into the 60s with more low end punch then a stock with a 18 tooth clutch bell overkill is what i was going for

I'm pretty sure a XXX-NT will be borderline uncontrollable with a TZ in it.