Hey Guys. I'm starting to get my build ready for my HR.. My goal is to break 500rwhp. I'm looking into a GTM turbo kit.. (Just to give quick basics). I've had people tell me the HR motor can handle over 500 on stock block with no worries.. But I mean. I've had a turbo'd car before.. I'm not to sure about it.. I would post this in the HR section but I wanted to go straight to the boosted people here for some insight. Anyone have an Idea if the HR can handle over 500 on stock internals?? Or am I smarter just building it and saving myself from any problems?? I'll take criticism. Hell.. If I didn't I wouldn't get any smarter on this lol.

 

I think the responses your going to get is that you have to wait as only time will tell. Being able to hit 500rwp on a dyno doesn't mean that it will not blow if driven hard at that PSI for 50k miles. Basically what needs to happen to find the "limit" is that enough people have to blwo their motors to get a range of "saftey". I personally have spoken to a couple HR TT owners and while they are tuned at 10PSI hitting around 500whp most of them drive with only 4-5psi of booost and dont' take it above 8.

My advice: If you have the money to build the motor, do it and keep the power level at 500whp as that will be a lot already but will be more safe than on a stock HR block.

If you don't have money to build the motor, just run it at about 4-5psi (i thikn around 400whp) most of the time and then take it up to 8 max when you really want to have fun. I'm guessing engine would last a good amount of time if you do that but like I said, no one knows yet.

Good luck with your TT

 

check the builds section, will prove better insight. but i agree with A.H. the builds havnt been out long enough to really know. i would say 500 dynojet is doable

 

Im pretty sure youve posted in every build thread so far on this site. Theyve only been out a couple months. No one can tell you how long it would last at say the power level GM hit on that roadster (580 or so)

 

Umm jiggy.... No I havn't. I posted in the hr askin what people have spent and idea of setups for turbos to get an idea. And this would be my 2nd thread on the topic.. Thats all.... So No....

A.H. your probly right.. I kinda wanna stay at 500. I'll see what it'll cost to build the motor.. Not like I won't be able to do it.. I like the idea of tuning 10pnds.. Thats what I was looking to tune it to. The idea of running it at like 4 or 5 psi is pretty smart.. And punch to 8 for fun. I'd say that be pretty safe on stock block.. I'll decide on the build or not as I'm getting into the entire build.

I just wanna get as much info and knowledge as I can so I'm aware of any situation and I know what I'm getting into from the start. I just don't wanna be a noob going into this and getting stuck or screwed somewhere.. I guess better safe then sorry??

But Jiggy. Your probly right. They havn't been out long. Not tooo much info to go on. Im practically a test subject on the limits.. If I wanted to do that lol.

 

600whp

 

Limit before blow??

 

NO ^^ he is just missing with you.

 

Lol. Figures lol. O well..

 

I know my waste gates are 7.5 psi on my GTM kit so that is as low as I can boost. That being said , I set the boost controller to 10 psi the first night and it gets driven that way every day. I know every time my car leaves the garage it sees 10psi multiple times. I figure if it blows I will add the GTM stroker motor. I'm not saying its safe or not, just that I do it and have gotten away with it so far.

 

How many boosted miles do you have so far?

 

How's yours holding up?

 

Yea I guess the more money you got the more you can go for broke. I mean I'll have another car by october anyways for winter. So I probly won't care.. But I'm just wondering if I should do a build now?? Or go for blown and if it happens I just but a built HR.. I waaaanna run 8-10psi daily. Only time I'd really ever go to hit that boost is getting on the highway or on the highway sometimes after.. I'd probly be living around 6psi..

I've ran 10-12 psi on stock blocks before.. Granted it was a K-Series Honda motor. But it help up good. I just don't know if I can compare the strength of the motors....

 

If I had a HR stock block, I would run it at 500 whp / 475 wtq MAX on a Dynojet. That's a really nice sweet spot for the street and I think the HR rods would last tens of thousands of miles at that power level. I wouldn't expect it to last for the life of the car though, esp. if there's any tracking involved. For long term reliability, 400-450 whp might be a better goal and is still very fast for the street or road course.

 

I think 450~485whp / 400~450tq (dynojet) is reliable (according to our testing and build success - one at 475 for over a year, a bunch more in the 450~485 range).

Just keep the torque down a little and they'll be reliable.

 

Most damage I see in boosted cars is from extended 4th and 5th gear highway pulls. Getting on it quickly 1st-- 3rd really only gets you a quick blast in each gear and tire spin. I will say that 7.5 psi on the waste gates should be plenty fun for all. I don't have any dynos of my car so I can only compare to what others with the GTM kit have done.

 

Thanks guyss.. Good info to keep in mind for goals..

 

The nice thing about the HR block(besides the stronger internals) is that it trades off more whp for less wtq over the DE. And since torque is what breaks motors the HR should be in good shape but I doubt you could get 500whp/475wtq(not that you would want to in realiablity's sake).

 

+1 - the limits are not known for sure right now, it all depends on how comfortable you are dumping big $$$$ into re-build, the costs add up and may be more than you are expecting.

 

Yea your right.. I read up on your who situation. Thats crazy. Dedication tho. Hows everything coming along with yours?? But from your experience.. Do you think I'm better off building the motor?? Or is the 400-450rwhp at w.e psi be a safe thing and nothing to worry about??