[mariojmoe]

Originally Posted by Blk16SS

That cam is a major concern for me... The specs don't compliment nor lend itself to the low end grunt you're wanting to experience with that blower.. It's gonna definitely sound good if a wicked lope is what your after. As for the heads, it's a toss up whether or not it's worth it. As I've stated before, a race valve job combined with light weight springs will go along way. Just not that big of a fan of hogging out a hole that's already 297cc's. Sexy build you have going on....

The cam is a Vengence stage three blower cam. I'm not 100% up to date on these lt platforms and cam spec's. As for ls I can lead the party so to speak. So in essence talk to me about this cam and your concerns as I still have time to change things up (cam is not installed bc motor is at the machine shop). I'm after more mid to upper end torque and power but don't want to sacrifice too much bottom end loss of power. I think at this point I have no choice but to port the heads to lower my boost. After talking to my builder with my compression up to 11.1 I'm almost in the danger zone. With the heads getting ported it should lower my boost. I could of coarse just use the bottom pulley and leave the upper pulley as well but I don't want to lose hp.

[Blk16SS]

Here's your cam...
https://www.briantooleyracing.com/su...fuel-lobe.html

As for the compression, we have 11.5:1 to begin with so you're fine on that end. Ported heads? It's a matter if 25-50hp means a lot to you. That blower solves alot of problems...

[mariojmoe]

Originally Posted by Blk16SS

Here's your cam...
https://www.briantooleyracing.com/su...fuel-lobe.html

As for the compression, we have 11.5:1 to begin with so you're fine on that end. Ported heads? It's a matter if 25-50hp means a lot to you. That blower solves alot of problems...

Ok is this the cam you suggest I should run with? (I'm a tad confused on wording). I currently have the Vengence 235/244/656/651 116+4 cam

[Blk16SS]

Yes , my opinion is this one would be better suited for your build based on what I see. When I speak about cams, it's drivability first, hp second ,100% of the time. You just went and spent $50k on a new car. So I'm willing to bet you would not want to sacrifice drivability that's associated with big duration cams... By you having a stick car helps a lot but ,too much duration doesn't help your blower. Also it's a 235 duration which moves the power band higher. An example would be let's say a 224/224 has a range of 2000-6500. Well my guess on yours would be 2800-7000. That's not to say it's not a great cam at all. Most of them are but it's probably better suited in a 416ci. Then there's the 1.7 issue. Just seeing that means get your money back if this is actually correct. On a 1.8, that would put you at a .680 lift... So basically my theory is because this will be a daily driver, this isn't the cam for you. If you planned on making it a weekend warrior then of course. Hell , your cam specs aren't too far away from the new COPO camaro... Hopefully I was helpful...

[mariojmoe]

Originally Posted by Blk16SS

Yes , my opinion is this one would be better suited for your build based on what I see. When I speak about cams, it's drivability first, hp second ,100% of the time. You just went and spent $50k on a new car. So I'm willing to bet you would not want to sacrifice drivability that's associated with big duration cams... By you having a stick car helps a lot but ,too much duration doesn't help your blower. Also it's a 235 duration which moves the power band higher. An example would be let's say a 224/224 has a range of 2000-6500. Well my guess on yours would be 2800-7000. That's not to say it's not a great cam at all. Most of them are but it's probably better suited in a 416ci. Then there's the 1.7 issue. Just seeing that means get your money back if this is actually correct. On a 1.8, that would put you at a .680 lift... So basically my theory is because this will be a daily driver, this isn't the cam for you. If you planned on making it a weekend warrior then of course. Hell , your cam specs aren't too far away from the new COPO camaro... Hopefully I was helpful...

Awesome advice sir and thanks. You are 100% on nearly everything you stated as far as it being my daily driver and I obviously don't want a surging miserable car to drive. I will pass this on to the shop and see about this cam. I'm not a track or numbes guy but for the coin I'm dumping in it do hope for something worth while (numbers and track times). Again thsnks for your input and if you think of anything else by all means please lmk.

[Blk16SS]

Originally Posted by mariojmoe

Awesome advice sir and thanks. You are 100% on nearly everything you stated as far as it being my daily driver and I obviously don't want a surging miserable car to drive. I will pass this on to the shop and see about this cam. I'm not a track or numbes guy but for the coin I'm dumping in it do hope for something worth while (numbers and track times). Again thsnks for your input and if you think of anything else by all means please lmk.

Well I took it one step further and talked to one of my boys at the shop. He's a major player in the LS/LT world and pretty much verified what I was saying cam-wise. You're in a less is more type situation. He said the BTR cam I referred you to is perfect, or any other cam in that range would work... He also said that because you're changing pistons, it would be a wise choice to have gone with the "LT4" replacement slugs instead. That would have gave you a static compression ratio of 10:1. Therefore allowing you to really crank up the boost levels. Something I didn't even think about. Combine this with E85 and you would have a monster on your hands...

[LibertyHill]

I thought the decreased compression came from the increased chamber volume of the LT4 heads, and the pistons only had a slightly different head configuration?

[Blk16SS]

Originally Posted by LibertyHill

I thought the decreased compression came from the increased chamber volume of the LT4 heads, and the pistons only had a slightly different head configuration?

He probably referred to the LT4's comp ratio when he said it. I could've not heard exactly correct. Basically coming down a point in compression would be beneficial...

[mariojmoe]

Ok guys here's the skinny! Just got back from the builder and went over the last 2 pages of this thread with him. Once more good catch and a huge thanks for chiming in and catching this glitch. Anywho as for right now I am going to contact Vengence tomorrow (closed today) and see about exchanging the lt1 slugs for lt4 slugs as they are still in box unused, and swap out that cam as well to a cam they have that is comparable to the btr cam blk16ss recommended. The rocker arm issue is in the air til tomorrow as well as they are closed today. If they exchange slugs and cam this will obviously take care of that concern. I am on the fence as we speak on head porting and snout and tb porting as my budget is starting to get stretched more and more and so far I've not used any plastic. If I can play with the numbers (financially) and squeeze out another 2k then I will probably go ahead and do it. If not I'll have to make do with what I have bc I still have a tune, heat exchanger, cold air intake, plugs, and ice box to pay for (already in budget). Only issue I see in the immediate future are clutch, axles, drive shaft. This will come in spring hopefully when I get the piggy bank a lil more filled meanwhile my out dated kitchen is begging for a remod but I can't drive a kitchen is how I look at it. Soooo, pretty much looks like I'm on hold for another 2 weeks at best. This is borderline torture guys (waiting, and spending $)

[Blk16SS]

Good deal... The right cam will solve your rocker arm issue. Just ask for a piston set that would lower your comp ratio from 11.5 to 10:1-10.5:1...

[mariojmoe]

Originally Posted by Blk16SS

Good deal... The right cam will solve your rocker arm issue. Just ask for a piston set that would lower your comp ratio from 11.5 to 10:1-10.5:1...

Thanks again man, Very good advice now after swapping pistons and cams this should be half ass decent. Almost sure on the heads and snout and blower porting but not 100% as of yet. Tomorrow I'll know

[mariojmoe]

More down time fella's lol. Heads going out Thursday to get ported, might port tb and snout while I'm at it tbh. They are calling for a 2 week turn around, By now I'm going to venture and say it's probably going to be another month. So much for a simple build. Beginning to wish I'd just tossed on headers and exhaust and called it a day, Car has been down longer than it's been in existence.

[ADM PERFORMANCE]

Originally Posted by mariojmoe

More down time fella's lol. Heads going out Thursday to get ported, might port tb and snout while I'm at it tbh. They are calling for a 2 week turn around, By now I'm going to venture and say it's probably going to be another month. So much for a simple build. Beginning to wish I'd just tossed on headers and exhaust and called it a day, Car has been down longer than it's been in existence.

Hmmmm

[jdasnt3]

Originally Posted by ADM PERFORMANCE

Hmmmm

Agreed. There is a pattern here.