Street and race engine builds

[Dan Cragin]

I thought these 2 engine builds we just finished might be of interest. Both Gen 2's, both around 650hp except one is smog legal for the street and other is for endurance racing.


The engine on the left is built with all the upgrades that were typically used on the GTSR model, except we did not use an external oil sump with the GTSR oil pump. The engine has 11.2 to 1 compression and a 248/252 duration cam with .620 lift and 108LSA. Its good for 7200 rpm but makes peak power around 6200. Limiting factor on the power was the production head castings and long runner intake.

The street motor includes a refreshed production forged bottom end, Gen 3 timing gear and chain conversion, 10 to 1 compression, JM Stryker heads, a 232/238 .600 lift cam with a 116 LSA. Its good for 6200 rpm and will pass California tailpipe emissions as well as the catalyst monitor.

Both engines requires bigger injectors and some fuel system changes. The race motor with a full Motorsports fuel system and the street motor with a Gen 5 fuel pump conversion.

[13COBRA]

Beautiful.

[steve911]

Nice job Dan.

[J TNT]

Awesome work Dan , Thanks for sharing .

[Steve M]

A part of me is sad that no OEM will likely ever make anything like that again, but I'm glad I got to be a part of it. Those look awesome, and I'm sure they'll run even better.

[ViperC]

What have you done to the oiing syatem on the left engine to achieve such high RPMs? Or is the GTSR pump that capable?

Also, what is the effect of such a tight LSA compared to the more usual 112-114 LSA?

[SharpesGarage]

Very cool, thank you for sharing.

Is the engine on the left utilizing just a ported factory head? or is it still stock porting?

[Ricketts]

Very nice!

[RedTanRT/10]

Saw them in person today, awesome!! Great work Dan!!

[GTS Dean]

Nice work Dan. What's the story with the valve cover breather nipples on the race motor - will you plug them? Do you have an external oil pickup hose on the right side of the pan, or just the left side?

[Loud]

Nice work, Dan.

[Luisv]

That's awesome. Need my A/C so street version is what I'd go for. When my engine needs to be rebuilt, eventually, that's what it will want to grow up to be! Looks like I'll know who to speak to.

Awesome.

[Dan Cragin]

Being that we use the production oil pan as the sump for this setup, the crankcase must be vented just like a dry sump tank. This setup is is technically not a dry sump, but a cheaper option to increase engine rpm. The production oil
pump starts to cavitate about 6200rpm. The oil pickup goes into just one side of the pan, but there is tube inside that goes to the middle of the pan with a trap door setup.

[mjorgensen]

Beautiful work as always Dan hope you're doing well buddy.