Well, i was instructed to run BR7s in my 427 also by my builder. And they ve been in since i knew what a BR7 was...so thats a good thing i supose. We ll see.

 

Hmmm.. Wrote to NGK. Curious if I'll hear anything back. Only ever seen NA guys go to a non-projected tip when they don't have clearance from a large domed piston.

Compromising things to run a higher compression on pump gas will be more detrimental to performance than simply running less compression. Kinda like the guys that just throw a thicker head gasket in to drop compression but ***** their quench.

A non-projected plug on an NA motor is counter intuitive to me, but I have seen people running them in LS7's and have read all the arguments on Corvette Forum about plugs. You may want to give TR7ix's a try too. That's what I had planned on starting with.

 

I run the same plugs as well. Ran them in my 383 LS1 and now in my LS7. I had two different tuners and engine builder say to run the same. I am going to spray too but not enough to make a huge difference and I am setting the car up for NA. I know DB even ran them in his bolt on LS7 after playing with a few plugs he liked the BR7 the best.

 

Happy Birthday to wifey. What size injectors did you order? You end up with 1050's from ID? That's what I have but the short style and I bought MSD rails that extend down to the short injector. I wonder if there's any risk for puddling with that? It's the same concept as the extenders just built into the rail. I wouldn't think it would matter much if above the injector like was said above.

 

Thanks for that. I'll give it a try. Likely won't go to IX though, because it seems I don't leave plugs in long enough to matter anyway, lol. I do have domes, for what that's worth. I'm interested to hear what they say.

 

So, props to NGK...this was a very fast couple of emails back and forth. Like I said, I've read all the arguments on corvette forum and I've seen most of them aggressively pushing the BR7EF, but I was going to go with my gut first and run the TR7IX first.

This isn't to say that NGK is an expert at 13:1 compression street/strip LS7 builds and he might not know why people are trying the BR7EF...but the best starting point will likely be a projected tip plug.

 

We always stick with non-projected because A) its NON-projected which is good when combining high HP and low octane (read 93 or less) and B) its still a resistive plug so much less concern for EMI.

 

I thought everyone ran E3 spark plugs? 😂😂😂

 

Just depends on who "everybody" is.....

 

I was afraid they would make so much cylinder pressure they would lift the heads so I went with ngk to be safe.

 

 

That would have been fun to watch.... LOL

 

I mean that would be asking a lot out of arp studs

 

You didnt order the holley talls did you? They dont fit if using YT adjustables rockers

 

I ordered the snipers. They arrived and do fit. Not baffled though. Maybe that's the difference?

 

I bought these ones and they didnt fit

If the rocker cover doesnt step in like my hand drawn pick i couldnt get the holley talls to fit

 

Good to know and thank you!! Wish I had taken a pic of the sniper rails. They are fabricated not cast. Hate to ask a really dumb question, but with the bolts loose, how far can you shove the covers toward the intake / valley? Is there enough slop to bias it a bit and still get it to seal?

 

I had to do a lot of grinding on ict billet 3/4" valve cover spacers. And to get it to sit on the head correctly I had to get yella terra 8mm rubber gaskets that are wide and cover the whole head.

to.do it again, I'd just buy the dang yella terra spacers that are high as giraffe nuts and be done. I went through 3 sets of aftermarket valve covers that wouldn't clear,1 set cost $700 custom fabricated that clear jesels but "should" clear yella terra adjustable ls3 rocker arms. Nope.

so eventually I plan to get the yella terra spacer that self aligns and some Holley sniper covers.
Darth, I bought Taylor plug wire and boot kits and custom made my own wires.

 

You can push rocker covers towards the intake , i still had to grind a little off inside of rocker covers. 12mm YT gasket didnt help, not the height thats the issue its the width

 

The thick YT gaskets and stock valve covers didn't work for me on my LS7 with adjustable YTs. It wasn't tall enough. I think Darth ran into the same issue because he had some thick gaskets I'm pretty sure. I reused my LS1 billet covers I had made for my YT's on that build and got lucky and they fit. Precision Metalcraft made them and I just got their tallest version. They fit really well. They made my intake for my boosted car too. Good company. Only issue with mine is they say LS1 lol