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Tooley TFS 220's vs 235's on 408

Old 01-11-2019, 07:33 PM
  #21  
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Originally Posted by JakeFusion View Post
That cam might be suited for a big shot of nitrous. How much are you spraying? If you're trying to spray 300, that cam would be good. But the exhaust port will need some work.

As far as the cam, it's designed for an LS3 head. And it's sort of a lot overlap for such an early IVC. Cathedral heads need overlap... but also need later intake closing points as they don't flow like an LS3 head. LS3 heads make power and are sensitive to overlap, so you usually undersize the intake duration and add exhaust duration to help them (generally speaking - exhaust flow sucks in comparison to cathedral with that big intake taking up so much space). But Blah blah. Cathedral heads make power with toasters for cams, so it'll work. I would have probably tried a 247/255 114+4 or so. But it's all in the ballpark. As I said, more exhaust duration carries the power higher and past peak. But it does flatten out the midrange gains. Tooley also sells an EPS 244/256 114 Cam... it makes big power too. And the valve events are closer to what I would want to see.

Other mods? ATI Balancer, EWP, 3" True Duals, 2" Headers, .036" quench, 12:1 CR (on 93... 12.5:1+ on E60/E85), short travel lifters, 3/8" pushrods etc. etc.

What I hate about NA Power is the cost to add 20HP. If you're trying to spray a lot, who even cares about NA power. Optimize it for the spray. You'll be running a tune with limited timing and cold plugs. It won't make huge power NA. But, if you don't plan to run it at the track and spray all the time, maybe don't worry about the spray as much.

What you'll find is that trying to get a lot of power out of an NA setup is frustrating. A 5.3L JY motor with a PT7675 would walk it for much much less money. And it would drive like stock. But there's other issues with turbo setups on these cars. Namely heat management. And retaining A/C and things like that.
Thanks for taking the time to write that. I appreciate the explanation.

I'll be spraying 250 ish, but here's the thing, I won't be spraying but maybe 25% of the time.

So you would recommend the EPS Cam over the one I listed?

What do you think it would run N/A, at a 3650 lb raceweight and something like 1,500 DA?
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Old 01-11-2019, 10:25 PM
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The one you listed will drive better. It's tamer.

I think something like 10.5-7s in the mid-to-high 120s NA (6sp or auto? auto might get to 10.3-4s). Get the DA to 0 or even negative with a nice cold day at sea level and you could maybe touch the 130s and bottom 10.3-10.4. Or get some weight out of the car.

I do more 1/8 mile stuff. If you could hit 6.70s in the 1/8 mile and 100+ mph, you would be doing great with that setup. 250 shot on top should get you to the bottom 6s and 112-114 in the 1/8. Which is something like a [email protected] in the 1/4. Anytime you can run 5.99 or better in a street car, you're flying.

Last edited by JakeFusion; 01-11-2019 at 10:33 PM.
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Old 01-11-2019, 11:44 PM
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Originally Posted by 98RedBird View Post
Define heavy amounts of nitrous. I'm going to be in the 250 range.
I plan on spraying 400ish. I have been doing 250 on my ls6 with the 220's and it has gotten me down to a 6.12 in 2000+ DA. I will probably keep these heads and try them as is. If they dont perform how I want, all I'm out is a few hours and head gaskets
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Old 01-12-2019, 07:46 PM
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So, I guess if I understand all of the comments in this thread, the Tooley 220's should be just as strong as the 235's in the mid range and may give up 20 or so way up top?

If that's the case, I'll probably just hang on to these heads as suggested. 20 isn't really worth the added cost to me (also as mentioned by others in this thread.

Ultimately, I started this thread just wanting to understand the power differences between those two heads on my build.
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Old 01-12-2019, 08:51 PM
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Please report back!
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Old 01-12-2019, 09:02 PM
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Just curious on what made you choose the tooley tfs 220s over the Mamo mms220s ?
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