L98 5 speed before and after bolt ons
 

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.

Re: L98 5 speed before and after bolt ons
 

sbd-

Re: L98 5 speed before and after bolt ons
 

Heres mine with a stock L98 G92 T5.

Re: L98 5 speed before and after bolt ons
 

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

Re: L98 5 speed before and after bolt ons
 

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

Re: L98 5 speed before and after bolt ons
 

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

Re: L98 5 speed before and after bolt ons
 

Re: L98 5 speed before and after bolt ons
 

Ported and ready to go

Re: L98 5 speed before and after bolt ons
 

Don't buy a Chinese HSR

Re: L98 5 speed before and after bolt ons
 

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.

Re: L98 5 speed before and after bolt ons
 

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.

Re: L98 5 speed before and after bolt ons
 

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.

Re: L98 5 speed before and after bolt ons
 

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

Re: L98 5 speed before and after bolt ons
 

No it screams past 5000.

Re: L98 5 speed before and after bolt ons
 

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

Attachment 326906

Re: L98 5 speed before and after bolt ons
 

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

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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.

Re: L98 5 speed before and after bolt ons
 

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

Re: L98 5 speed before and after bolt ons
 

Ok.

Re: L98 5 speed before and after bolt ons
 

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..

Re: L98 5 speed before and after bolt ons
 

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