Chad took the words out of my mouth :beer:

if you do the research on the 220, 224, 225 cams you'll find they fit your needs. can you go bigger, yes, but your only gaining hp above 5k in a narrow powerband.

as far as installing it yes you would install it straight up. TR and TSP give you the exact specs as calculated off a cam doctor. my old tr 230/224 .575/.563 111lsa spec'd out at 230.3/224.2 .578/.565 110.5

 

Well I'm almost convinced to go for the TSP 225.
Below 5K is it going to be making the same or more power than something bigger like a 232? Common sense would say that the 225 would make better mid range than the larger cam.

Cheers

Mike

 

Nice car Cobra.

Im in Melbourne too and there are heaps of places you can ask for this kind of advice, should you wnat to do the ring around or visit. Register yourself on the http://ls1.com.au forum.

As far cam, if its pretty much a stock LS1 but you want to go big I would recomend a reverse split 224/220 cam. Not big by todays standards but will give you better idling and torque response than a 224/224. Heaps of places in Melbourne can make these custom cams for you - Crow, COME, Crane etc..

See you on the forum!

 

https://ls1tech.com/forums/dynamometer-results-comparisons/195553-comparison-3-cams-graph-inside.html

tr224: 224/224 .563/.563 112+4
g5x2: 232/240 .595/.608 112+4
FM13: 230/232 .591/.585 112+4

stock heads w/ bolt ons. check is sig for the full run down.

 

Hi MNR-0,

I'm on the LS1.com.au forum also. My handle is the same LS1 Cobra. It's a good forum with a lot of good info but very Commodore focused. I found LS1Tech just recently and it's been great to get a different perspective and some different ideas.

Do you go to many of the dinners? I've been to a couple of the ones out west at the old Keilor hotel. I also took my Pursuit 250 to the combined LS1.com Utez.com dyno day (The stock 347 windsor pulled 264HP at the rear wheels through the auto which is pretty good for one of these).

Cheers

Mike

 

That's great stuff. The 224 definitely has the superior performance down low and the torque curve is pretty flat compared to the others. The other two cams don't make any headway on the 224 at all till 5K.

You put forward a convincing argument to the big cam debate.

Cheers

Mike

 

Im not saying to go huge here, or to select from "the flavor of the month bin" at all. Did I mention a G5X2, X3, or Trex anywhere?? I just mention along the lines of a 228. He also said it would be a little better for his light weight car to make the power a little higher up in the band so hes not roasting the tires early on.

Just curious, you probably know more than I do, but why would a 224 make his car a more efficient set-up than say a 228-230? If tuned properly the 228 should drive just as well as the 224, make good under the curve power, and pull a little harder and longer on the top end.

I had a TR 224 .563 114 in my 99 and loved it. I drove it around for a little less than a year and then put in a Futral Motorsports FM11 (228-230 .587 .595 112) I never got retuned and the car drove just as good as the 224. Loads of TQ and pulled harder in the upper RPMs. I was very glad I made the switch. By the way, I am not a track guru, Im a street guy so I am not promoting huge cams by anymeans. My FM11 was very street friendly. No difference in drivability between that and my 224. Either way, Im sure you'll be very happy with the performance of your Cobra.

 

Where you are tuning MAFless and can swap a cam so quickly I would go big (but not big enough to necessitate flycutting)

Spring choice looks great but I think a 230/236 on 110-112LSA would work very well. I would also consider putting good rod bolts in the motor as well as headstuds.

The added exhaust duration will help where you run cats and the car should peak around 6200-300rpm

With stock rods I wouldn't rev above 6600rpms regardless. (6200rpm shiftlight should have you reacting and pulling the shifter around 6400rpm)

Should make great power and sound like a BEAST!



ps- Be sure to clay to check PtoV clearance.

 

I have a 228 CAM and I had PTV clearance issues and required flycutting on unmilled 5.3 heads. Maybe the 5.7 heads have more room, but I don't think so. I would stick with what JRP recommened like a TR224 or TSP225 if you are concerned about PTV.

 

We don't have to do the you know more than I do thing. I am making no assumptions to the depth of your knowledge nor am I trying to present myself as being intellectually superior.I was merely expressing my opinion in a somewhat assertive manner. No offense intended.

Anyway, this post of JRP's is a perfect example of what I mean :

This "baby cam" performs within a few percent of the much larger cams noted in the quoted post. His goal of 370+ will be easily made with the smaller cam. Goal met,least amount of grief involved. That's a slam dunk in my opinion.

Most can tune a 224 cam with relative ease. The others can be *for some* very difficult to get to function well in around town driving. Not impossible by any stretch but it is more difficult for most.

The 224 should require less spring and should also require them to be serviced less.

PtoV will not have to be checked with the 224 unless the heads have been severely milled.The others *I personally* would check.

Other points such as emisisons compliance,drivability,etc. come into play as well.

I know you were not comparing the above cams directly to the 224 range cams. I'm just making my point with these for ease of argument.

A 228 would be *fine* I am sure. However, if your goals can be thoroughly satisfied with less I say that's the way to go.

 

Chad, I wasn't trying to be a smart ***, and I am by no means an expert on this subject or even close to being a cam expert. I was actually being serious when I asked why the 224 would be more efficient. Im on here to gain knowledge, not be a smart *** and play games on the internet. I do agree with everything you had to say about the 224 also. Better spring life, easier to tune, great low/mid range power, and he should easily see over 370 at the rear with that cam. The 224 is a great proven performer. Im sure he would be happy with it. I just wouldn't be suprised, if later on down the road, he would have the desire to go a little larger.

Nick

 

Sweet looking ride, you have defentially earned the respect of many LS1tech guys.

I believe that the 224 cam is the best all around cam for a LS1 ever made.
At the same time this IS NOT the cam I use, and will probally never use again.
I race the car more and the 224 dosen't do the trick quite as well as the bigger cams.
I would defentially suggest this cam for what you are trying to achieve.

I myself in your application would use this exact cam.
Ported heads can do you wonders, and with the correct bolton's 420 RWHP could be made with good heads.
I am sure that for the extra 1500 dollars you could really make some people even more jellous then they already are. (Including myself)

 

You've got my dream car. Cobra + LS1. *drool*

I'm gonna throw in my hat for a smaller cam too. 224/224, 225/225, or maybe even the 224/228. On a 112 LSA and a relatively low idle your car WILL lope pretty good. I have an older T1 (221/221 112LSA) and at stock idle it lopes realllll nice.

Dope