need help deciding on turbo cam
08-18-2012, 02:24 AM
#1
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need help deciding on turbo cam alright, been all over the forum and other sites and googleing and reading and digging and finally have com to a range that i think would be good for a rear turbo cam, now just need help to somewhat get the final decision.
mind you, im going rear turbo on about 8psi with a ON3 T76 .81, stock 98 Ls1, revmaxx 3200 stall, 2.73 gears, LS6 intake manifold, dont want a big old lopy cam meanin i like it to somewhat be like stock idle, want good out of boost response and would like to use MOST of my RPM range. might go 317s but for now, lets stick to the stock 98 ls1 heads i have for now.
would love to know if anyone has simular to these. ive read alot of guys using the TU1, just want to know about the slightly smaller ones as well.
since i have a stall, i know i can get away with a slightly larger cam, but i want to stick to the mild side for the turbo.
im sticking to the higher LSA's to keep some smoothness to it. i perfer a smoother idle to a rough aggressive one.
alright the cam ranges are:
from smallest to largest
speed inc. TU0
216/216 .561/.561 LSA 114
Been cross referencing these cams from Hawks thirdgen on ebay Comp cams , Speed Inc, and Texas speed cams simular or exactly to the tu boost cams
220/220 .581/.581 LSA 114-116 (simular to a SI1 but more LSA on Speed inc and TSP's sleeper cam)
224/224 .566/.566 LSA 114-115 (an in-between i was considering)
224/224 .581/.581 LSA 114 (SI3 on Speed inc and TSP's 224R)
speed inc TU1
225/225 .581/.581 LSA 113
TSP
228/228 .588/.588 LSA 114 (probably the largest im willing to go)
mind you, im going rear turbo on about 8psi with a ON3 T76 .81, stock 98 Ls1, revmaxx 3200 stall, 2.73 gears, LS6 intake manifold, dont want a big old lopy cam meanin i like it to somewhat be like stock idle, want good out of boost response and would like to use MOST of my RPM range. might go 317s but for now, lets stick to the stock 98 ls1 heads i have for now.
would love to know if anyone has simular to these. ive read alot of guys using the TU1, just want to know about the slightly smaller ones as well.
since i have a stall, i know i can get away with a slightly larger cam, but i want to stick to the mild side for the turbo.
im sticking to the higher LSA's to keep some smoothness to it. i perfer a smoother idle to a rough aggressive one.
alright the cam ranges are:
from smallest to largest
speed inc. TU0
216/216 .561/.561 LSA 114
Been cross referencing these cams from Hawks thirdgen on ebay Comp cams , Speed Inc, and Texas speed cams simular or exactly to the tu boost cams
220/220 .581/.581 LSA 114-116 (simular to a SI1 but more LSA on Speed inc and TSP's sleeper cam)
224/224 .566/.566 LSA 114-115 (an in-between i was considering)
224/224 .581/.581 LSA 114 (SI3 on Speed inc and TSP's 224R)
speed inc TU1
225/225 .581/.581 LSA 113
TSP
228/228 .588/.588 LSA 114 (probably the largest im willing to go)
Last edited by JoshuaGrooms83; 08-28-2012 at 02:47 AM.
08-18-2012, 10:42 AM
#3
We have 3 new turbo cams coming out soon I am designing.
If you would like to be one of the first to buy one we are giving discounts to those first buyers of each one.
Stage 1 is 226*/226* .605"/.605" 113+3 which I think will work very well for you. Our cam kits start at 679.99 with the cam at normal price and we exclusively use Brian Tooley valve springs in our packages along with Manley hardened push rods.
If you would like to be one of the first to buy one we are giving discounts to those first buyers of each one.
Stage 1 is 226*/226* .605"/.605" 113+3 which I think will work very well for you. Our cam kits start at 679.99 with the cam at normal price and we exclusively use Brian Tooley valve springs in our packages along with Manley hardened push rods.
08-18-2012, 03:23 PM
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08-18-2012, 03:32 PM
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We have 3 new turbo cams coming out soon I am designing.
If you would like to be one of the first to buy one we are giving discounts to those first buyers of each one.
Stage 1 is 226*/226* .605"/.605" 113+3 which I think will work very well for you. Our cam kits start at 679.99 with the cam at normal price and we exclusively use Brian Tooley valve springs in our packages along with Manley hardened push rods.
If you would like to be one of the first to buy one we are giving discounts to those first buyers of each one.
Stage 1 is 226*/226* .605"/.605" 113+3 which I think will work very well for you. Our cam kits start at 679.99 with the cam at normal price and we exclusively use Brian Tooley valve springs in our packages along with Manley hardened push rods.
but while i was already go most of my rear mounted turbo parts already, i decided to start looking into a more freindly hand and cam setup for the motor after i get the turbo portion hooked up and runnign properly. im doing this as a two part research tech thing so that i can provide some more rear turbo science to the forum, since its a very "touchy" subject to some lol
id love to but i wouldnt even be able to give you a home address for the purchase until oct anyway lol silly army moving me and stuff lol
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08-18-2012, 05:06 PM
#8
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planning my route as a i build. trying to figure stuff out as i go. if i have this part planned out before i even think about yanking out the heads and cam... thats less stuff to have to research about later. doing my homwork now so i can play later. the turbo portion is close to being done. just need fuel pump and injectors and of course my car now lol moving was an unexpected happening so the projecto got pu on serious hold. it was already on hold when i was suppose to deploy but that got scrapped so i thought i might have some time to build again and then i got orders to texas. still can do the research portion so i have my build planned out instead of guessing and throwing random parts at my car and hoping it works. not how i do things.
as of right now my cars on a boat so all i can do is plan for it anyway.
as of right now my cars on a boat so all i can do is plan for it anyway.
08-19-2012, 04:10 AM
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well, after some looking around and talking with TSP sponsor, think ill go with the 224R cam. still wondering if i should get it with 116 LSA but the 224/224 .581/.581 im really considering. its a bit of a compromise between the TU1 and the TSP sleeper cam. a good tryed and true N/A cam that looks to be a good compromise turbo cam. much better then my stock cam that i have right now anyway lol
Last edited by JoshuaGrooms83; 08-28-2012 at 02:49 AM.
08-19-2012, 04:33 AM
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im not sure what tsp uses for the lobes, but .581 lift seems to be the general area for turbo cams. i
m wondering what the TU1 cams use for .581 lift as well?
m wondering what the TU1 cams use for .581 lift as well?
Last edited by JoshuaGrooms83; 08-19-2012 at 04:41 AM.
08-19-2012, 01:05 PM
#12
The lobes that cam is ground on are way to aggressive for any kind of forced induction and yes Jason those are XER lobes which several people in the cam and valve train industry have been telling me have been the cause of some valve train failures due to a too fast closing ramp on the seat of the valve.
The lobes my stage one cam uses are a much better fit which are LXL lobes.
08-19-2012, 03:15 PM
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..... ug.... and i thought my modest cam choice would be easy lol here im looking at probably the smallest of most cams and i still cant get it right lol
ok... so what exactly is the problem with XER lobes? is it becasue of using it on turbo application or is it problematic in N/A applications as well?
Originally i was thinking TU1 but thought that cam might be too much for what i was thinkign of doing, so i thought maybe a slighly smaller cam or even one in the middle between the two would suffice but now im being confoosed again lol
AS for the 226, if you could divulge a little more info without spiling trade secrets, would be nice. what would the difference be say that one and some of the ones like TU1 thats close to the one your selling?
ok... so what exactly is the problem with XER lobes? is it becasue of using it on turbo application or is it problematic in N/A applications as well?
Originally i was thinking TU1 but thought that cam might be too much for what i was thinkign of doing, so i thought maybe a slighly smaller cam or even one in the middle between the two would suffice but now im being confoosed again lol
AS for the 226, if you could divulge a little more info without spiling trade secrets, would be nice. what would the difference be say that one and some of the ones like TU1 thats close to the one your selling?
08-19-2012, 05:17 PM
#16
..... ug.... and i thought my modest cam choice would be easy lol here im looking at probably the smallest of most cams and i still cant get it right lol
ok... so what exactly is the problem with XER lobes? is it becasue of using it on turbo application or is it problematic in N/A applications as well?
Originally i was thinking TU1 but thought that cam might be too much for what i was thinkign of doing, so i thought maybe a slighly smaller cam or even one in the middle between the two would suffice but now im being confoosed again lol
AS for the 226, if you could divulge a little more info without spiling trade secrets, would be nice. what would the difference be say that one and some of the ones like TU1 thats close to the one your selling?
ok... so what exactly is the problem with XER lobes? is it becasue of using it on turbo application or is it problematic in N/A applications as well?
Originally i was thinking TU1 but thought that cam might be too much for what i was thinkign of doing, so i thought maybe a slighly smaller cam or even one in the middle between the two would suffice but now im being confoosed again lol
AS for the 226, if you could divulge a little more info without spiling trade secrets, would be nice. what would the difference be say that one and some of the ones like TU1 thats close to the one your selling?
I do know that the XER's @.200 duration numbers are way too aggressive for anything turbo and so are the closing ramps of the lobe.
Also you want more area on the actual lobe which means more total duration, less @.200 duration and the right amount of @.050 duration to achieve this.
The lobes I use accomplish this.
Speed Inc's Tu1 cam is a great cam and is proven, but again I do not know what lobes they use and if a company doesn't divulge the lobes they use then I wouldn't ask them because they probably don't want anyone to know for good reason.
Our Stage 1 cam will be 226/226 .605"/.605" 113+3, has more total duration than similar 225 or 226 @.050 cams, less .200 duration than similar @.050 cams while utilizing slightly more valve lift. More valve lift which up to a point won't hurt anything when used in the right valve train set-up like with stock rockers and the Platinum BTR valve springs we use with all our cam kits that will be utilizing stock rockers.
There's more to picking out a cam than looking at the rated numbers and saying, "That looks good, I'll pick that one"!
08-19-2012, 05:58 PM
#17
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ok so i went down the rabbit hole again.... and got lost... again.. then started to claw my way up, got dragged down about EPS lobed cams.... the started to claw my way up.... then got draged down again about LXL, LSL, and XE lobes... aND THEN finally emerged alittle more enlightened, and...... undecided yet again lol
actually in all seriousness, was actually thinking of custom grinding my cam using either the XE or LXL lobe or a combo of them both rather then the XER
what im wondering is since all the cams im looking at are under .600 lift, is there realy that big of difference in valve aggression and wear as compared to the .600 and above that require higher and stonger springs that casue more wear and tear? pac 1218s and 1518s could hold these down without any problem?
the problem is i ask one vendor then i get another telling me other stuff. gets a little confusing. so i have to pick and choose what i think will work for me in the middle somewhere.
i am however starting to look more at your 226's.
im definitly taking my time choosing a cam, not just picking and buying.
actually in all seriousness, was actually thinking of custom grinding my cam using either the XE or LXL lobe or a combo of them both rather then the XER
what im wondering is since all the cams im looking at are under .600 lift, is there realy that big of difference in valve aggression and wear as compared to the .600 and above that require higher and stonger springs that casue more wear and tear? pac 1218s and 1518s could hold these down without any problem?
the problem is i ask one vendor then i get another telling me other stuff. gets a little confusing. so i have to pick and choose what i think will work for me in the middle somewhere.
i am however starting to look more at your 226's.
im definitly taking my time choosing a cam, not just picking and buying.
Last edited by JoshuaGrooms83; 08-19-2012 at 06:08 PM.
