[Z06] Head and Cam: Round #2
04-08-2016, 04:59 PM
#21
I agree with others, get a custom ground cam. Martin Smallwood just spec'd me a solid roller and the guy is very good. I also considered Ed Curtis (with FTI) for spec'ing a cam, also very good. I can get you Martins number if you want, just pm me. He'll work with you on every aspect of your combination and what you want to achieve.
If you're going to run higher compression, you might look into using e85 or a methanol injection. Anything over 11.8:1 and you're risking detonation with 93. I'm going with methanol injection because e85 is not very abundant in my area.
If you do decided to run a shelf grind, I'll have my BTR Stg 4 up for sale soon. Maybe even this weekend.
If you're going to run higher compression, you might look into using e85 or a methanol injection. Anything over 11.8:1 and you're risking detonation with 93. I'm going with methanol injection because e85 is not very abundant in my area.
If you do decided to run a shelf grind, I'll have my BTR Stg 4 up for sale soon. Maybe even this weekend.
04-08-2016, 06:45 PM
#23
Pretty sure Brian learned a ton from someone else too. 
Point is, a custom cam from someone that knows what they're doing will get the most out of a custom setup, optimizing compression, heads, intake etc.. I would never use a shelf grind for an engine running over 12.0:1 compression when most shelf grinds are optimized for pump gas.
Point is, a custom cam from someone that knows what they're doing will get the most out of a custom setup, optimizing compression, heads, intake etc.. I would never use a shelf grind for an engine running over 12.0:1 compression when most shelf grinds are optimized for pump gas.
04-08-2016, 06:53 PM
#25
Drifting
Thread Starter
I agree with others, get a custom ground cam. Martin Smallwood just spec'd me a solid roller and the guy is very good. I also considered Ed Curtis (with FTI) for spec'ing a cam, also very good. I can get you Martins number if you want, just pm me. He'll work with you on every aspect of your combination and what you want to achieve.
If you're going to run higher compression, you might look into using e85 or a methanol injection. Anything over 11.8:1 and you're risking detonation with 93. I'm going with methanol injection because e85 is not very abundant in my area.
If you do decided to run a shelf grind, I'll have my BTR Stg 4 up for sale soon. Maybe even this weekend.
If you're going to run higher compression, you might look into using e85 or a methanol injection. Anything over 11.8:1 and you're risking detonation with 93. I'm going with methanol injection because e85 is not very abundant in my area.
If you do decided to run a shelf grind, I'll have my BTR Stg 4 up for sale soon. Maybe even this weekend.
04-08-2016, 09:05 PM
#27
Drifting
Thread Starter
Sounds like this would've been a solid 600rwhp setup with a compression bump and an MSD/102?
04-09-2016, 01:13 PM
#28
Drifting
Thread Starter
All the strong forum personalities and just a few that are sharing. I'm surprised and a little disappointed.
Last edited by Turbo2L; 04-09-2016 at 01:13 PM.
04-09-2016, 06:54 PM
#29
Probably would have made around 600 @ the wheels w supporting mods and a tad more comp. 600 is pretty typical for that cam w mods. Heads just had a cleanup pass of .010", stock gaskets.
04-11-2016, 04:48 PM
#30
Call Jones. He has made significant advancements with LS profiles over the past two or three years. His Inverse roller cams, paired with good lifters and springs make serious power. He uses a smaller radius grinder to get more of an Inverse than others do. You get more valve opening, with less duration, but a nice touchdown on the close. You just don't hear about his cams on these car forums, because most of his customers are hard core racers who do not by BTR and Comp cams and springs.
04-24-2016, 08:51 AM
#31
Call Jones. He has made significant advancements with LS profiles over the past two or three years. His Inverse roller cams, paired with good lifters and springs make serious power. He uses a smaller radius grinder to get more of an Inverse than others do. You get more valve opening, with less duration, but a nice touchdown on the close. You just don't hear about his cams on these car forums, because most of his customers are hard core racers who do not by BTR and Comp cams and springs.
04-24-2016, 11:16 AM
#32
What did you tell him? Not being part of that conversation, I don't have any idea what you asked for.
Keep in mind that with an inverse roller, you can run more duration with less overlap, but without increasing opening velocity. I'm betting with the cam he called out, your seat to fifty valve OL is pretty close. I don't know why they are not more popular. Probably costs and difficulty involved in grinding them.
Keep in mind that with an inverse roller, you can run more duration with less overlap, but without increasing opening velocity. I'm betting with the cam he called out, your seat to fifty valve OL is pretty close. I don't know why they are not more popular. Probably costs and difficulty involved in grinding them.
04-24-2016, 06:24 PM
#33
Drifting
Thread Starter
What did you tell him? Not being part of that conversation, I don't have any idea what you asked for.
Keep in mind that with an inverse roller, you can run more duration with less overlap, but without increasing opening velocity. I'm betting with the cam he called out, your seat to fifty valve OL is pretty close. I don't know why they are not more popular. Probably costs and difficulty involved in grinding them.
Keep in mind that with an inverse roller, you can run more duration with less overlap, but without increasing opening velocity. I'm betting with the cam he called out, your seat to fifty valve OL is pretty close. I don't know why they are not more popular. Probably costs and difficulty involved in grinding them.
Repeatability and proven performance is where I find comfort.
04-24-2016, 11:06 PM
#34
Jones has benn grinding IR cams for decades. You'd hardly be 101.
Step out from the land of car forums. There's a whole nother world out there.
04-25-2016, 11:51 AM
#35
04-25-2016, 12:01 PM
#36
Burning Brakes
04-25-2016, 04:28 PM
#37
I filled out one of his cam recommendation forms... I'll share what he specs out, in this thread. It'll be interesting to see the differnece vs the current cam gurus recommended specs.
04-27-2016, 04:56 PM
#38
Here's what he had to say... lift would be the .360 x 1.8... .648".. that lift makes me nervous with hollow stem intakes and not fully knowing my spring specs, I know they're either the .660 pac's or the eht's... and this is ICL of 110.. so 114+4.
255/261 .648" 114+110... I wonder what I'm leaving on the table between the 2 cams, and what kind of drivability differnece there would be.. hmmm
255/261 .648" 114+110... I wonder what I'm leaving on the table between the 2 cams, and what kind of drivability differnece there would be.. hmmm
Last edited by FRiCK916; 04-27-2016 at 05:05 PM.
04-27-2016, 10:10 PM
#39
You're using small bore heads on a 4.135 bore???
I'd be less concerned over lift than the heads. Plenty of spring options out there to control the valves.
"Max effort" street duty, and you are concerned about drivability? I think you may need to revisit priorities. No, that cam will not play nice under about 2500 rpm. Might be a nicer playmate with some better heads and a larger intake valve.
I'd be less concerned over lift than the heads. Plenty of spring options out there to control the valves.
"Max effort" street duty, and you are concerned about drivability? I think you may need to revisit priorities. No, that cam will not play nice under about 2500 rpm. Might be a nicer playmate with some better heads and a larger intake valve.
04-27-2016, 10:19 PM
#40
Burning Brakes
This is as big as I can go, and still work with your springs.
Cam# LS7, HR75348-77348-116
242/250 @.050"
.348"/.348" Lobe Lift
.626"/.626" Valve Lift
116 LSA