car is an 87 formula with a crate L98. Stock except for an ORX


Second vid is after a CAI, 1.7'RR's, and 2210 hooker super comps. (Open headers at this point. I also pinched off the fuel return line to temporarily raise the fuel pressure. TPI system is stock otherwise.


According to my GPS (live 5 hours from a track) it's gained around 9 mph from those mods.

Stock was a best of 91.8 mph

CAI alone got it up to 95.3 mph. The car felt noticeably faster from that alone.

After was the RR's, which got me up to 97.1 in worse conditions. Car revved higher.

Last was the 2210 hookers. Which were a fun install. I also pinched off the fuel return line to bump the fuel pressure. Car felt way faster again, and revved even higher. First pass was 100 mph on the nose.

Next up is an HSR. We will see what that brings! Thought I would share my experience so far testing individual mods.

 

sbd-

 

Heres mine with a stock L98 G92 T5.

 

Hsr was big gain on my L98. .4 sec and 3 mph on average.

 

That's sweet. My car is a G92 car as well

 

Damn. That's huge! These L98's are sure choked out

 

 

Ported and ready to go

 

Don't buy a Chinese HSR

 

Why? Pretty sure we've already established they're made well, they can be ported bigger, and they do the job just fine. If one of the performance industry's biggest name can't compete, well, that's their fault.

 

The port alignment was horrid for one thing. And I had to do a pile of grinding just to get it to seat on the heads. Also the injector spacing is off and you can just barely pound the rails in place. Metal quality is good. But the casting is way off.

 

Update:

Finally got it running right with a debacle over some bad injectors. It ran 102 mph with ease in much warmer weather. AFR was in around that 12.5 range

Car runs great, even on the stock prom. It may have lost some low end TQ but it still has plenty and more than makes up for it on the high end. I shift it around 5800 now on the stock cam.

 

If you were to shift it around 4800-5000 you would go faster. Your power peaks around 4800.

 

No it screams past 5000.

 

I shifted at 5500 on my hsr l98. Peak was 5200 but fallin quick by 5400. But it was leaning out alot. Tune was alittle off up top

I dont have the one in rpm anymore

 

I have 1.7RR's too. Helps power over the curve

 

It may rev that high but you're not making anymore power that high. Especially with a stock TPI. Next time try it and see.

 

I don't have a TPI. I have an HSR.

 

Ok.

 

My car went 13.20's@105 with just an exhaust system with 3.42 gears shifting at 4900 just like in my video above..

 

Before and after vids of racing the same hemi ram are up in the street racing section