any body out there still using tr 6s with a 200 shot. I am using 112 octane in stand alone 93 in factory tank with 22 deg timing afr is 10.8 ,any coments are welcome . 11:1 comp

 

I have sprayed my 200 shot on TR6s many times. When I switch to the 250 shot, I go to TR7s. And mine is on straight 93 octane.

 

what kind of comp you runnin , how much timing on 200 ,and is that a rwhp rating

 

Comp around 12:1 static - but with my cam, its got a reasonable dynamic. 21 degrees. Its a flywheel rated shot - I have a plate setup on a Vic Jr intake so we used the nitrous jets the plate manufacturer had rated for a given shot and had to do a little experimenting to get the fuel jets right for the higher EFI fuel pressure.

I will be the first to admit that I tend to push the envelope a bit - so if you wanna play it safe - use TR7s!

 

I have a ms3 on a 114 does the higher lsa make more comp compared to say something on a 112

 

The lsa has alot to do with it - there is a formula to figure it out. I had an expert figure mine out for me since that is not an area I know much about. Like I said above - I tend to push the envelope - if you wanna play it safe, most people will recommend you go to TR7s. They are not bad to drive on the street with if that is what you are worried about. They will foul and need replaced a little sooner than a TR6 if you do alot of street driving and low rpm idling or cruising - but not bad...

 

do tr7s have a projected tip like tr6s

 

No - non-projected tips.

 

I tried some br something 7 ngks on my 150rwhp kit and it killed some hp or mph and et but I maybe could have got it back with a lil timing but at the time i jus put 6s back in it and didn worry bout till now makin close to 630 at the wheels

 

BR7EF - yeh, thats a TR7. You mighta got some of it back, but I'da went with 6s for that too. Try the 7s with your new setup and see if you lose anything - won't hurt to go colder and see what it wants...

 

cool thanks alot Im gonna try the 7s at the track read the plugs and if needed may add some timing back.its a dual stage set up single nozzle 70hp or like a 40nos28fuel and a dualnozzle150rwhp on top of it.but the 6s have several passes on them and porcilin is jus now showing signs of fatige so maybe i stick with em or not hell we are always trying to find the perfect balance between safety and hp who knows whats next!

 

Should be fine with that race fuel and that much gas. Only one way to find out right? HAHA. Pull one out after a run and see what it looks like.

 

I was running the TR6's on my 250rwhp shot, and 104 trick with 22* timing. But like was said, if ya want to play it safe, go with the tr7.
Robert

 

I planned on running a 200rw shot but found out I need dual nozzles to get 200rwhp. I did go with the autolite ar94 just for added safety and driving the car on the street I did notice some more surge and a quick misfire here and there at part throttle but at WOT its fine. Those autolite ar94 seem heavy duty I actually bent the round style spark plug gapper with it. The electrode on the ar94 is defiently seems alot tougher then on the 103's that I was running.

 

I think you're nuts putting anything hotter then a 7 in the car.. I'd start with a tr8. What's worse, leaving a little pwr on the table, or melting something?

 

i dont know if id call it "nuts"

my TR6's have gotten along perfectly with the 200 shot plenty of times. I agree a 7 would be safer, but i think "nuts" is a little over the top

 

Do what ya want... when I start spraying my car I'll most likly put #10's in to start. Like I said, I'd rather leave some on the table and work up the tune, then start off hot and break ****.

Too many people start off hot, and that's how nitrous get's it reputation.

 

X2 - sprayed a load of bottles through mine that way. TR6s with the 200 shot, TR7s with the 250 shot and pump gas as well. Nothing melted, nothing broke. I would agree that the tune has to be right tho!!

 

Well after you have well over 200 passes on the juice running TR6 with out a problem up to 250rwhp shot, thenyou may have some good input. Not saying your opinion is not welcome, but some are giving real life spraying facts.
Robert

 

I'll have plenty of real world experience to tell soon enough. But, with 13.5 to 1 compression and nitrous, I'm not taking any chances.