NA vs Turbo cams

[YoNkErS87t]

What is the correct timing for N/a cams in a 7mgte or does it go by the Ecu If so than I should just set it at the factory setting.

Someone please help. thanx

 

[IJ.]

Just set it up to Factory specs Yonkers, the ECU has nothing to do with cam timing it's all mechanical.

 

[YoNkErS87t]

Thanx. I was just wondering if the N/a cams would need a different timing set.

So I guess the factory spec would be fine.

 

[Squid699]

just make sure you check your valve clearances, as you would any time you change your cams or mess with the valves and do the cam timing as per TSRM. Haven't had any issues with mine....

 

[kaz87supra]

^ did you notice a difference with the na cam??

 

[jester1341]

i read the cams duration and all is the same NA and turbo. i know the turboA cams are 110 duration as apposed to Aspec turbo cams being 100[pretty sure]

i also would like to know if you notice anything with NA cams[have two sets out back and a head that is off the car and waitin to go on........easy swap ]

john

 

[Squid699]

kinda hard for me to notice a difference when I didn't have a turbo to have a baseline with. The joys of doing a conversion with a slightly modded full rebuild

 

[supra90turbo]

lol. i was about to say the same type of thing squid.
something to the effect of:

"yeah. ask squid. the n/a cam on his turbo engine was a serious power increase! of course, he added a turbo the same time...."

yep.
::sigh:: whatever! i gotta bring my post count back up somehow... i was at exactly 2500

 

[kaz87supra]

haha, i didnt even see the NA-T

 

[lagged]

hah this time around im gonna have an NA cam in my motor, but at the same time its a fresh rebuild with oversized pistons so id suppose i couldnt give an accurate opinion either way.

 

[Idealsupra]

ok let me help:

the NA cams are a decent mod for low power 7ms... basically they give the turbo engine a NA powerband but keep a decent amount up top... so you gain about 5-10hp but the real "feeling" is more because it switches your powerband down low...

the bottom line is..this mod is good up to about 300-350hp 7m engines...after that you will be SEVERELY hindering your turbos potential and performance...

 

[Squid699]

that's about the threshold for this engine anyway....anything beyond that and I'm gonna build a stonger engine...

 

[Idealsupra]

that's about the threshold for this engine anyway....anything beyond that and I'm gonna build a stonger engine...

well yeah obviously in your case thats all fine and good lol MR NA-T lol

but a lot of STOCK turbo guys are putting NA cams in...so i figured i would clarify for them

 

[jester1341]

ok let me help:

the NA cams are a decent mod for low power 7ms... basically they give the turbo engine a NA powerband but keep a decent amount up top... so you gain about 5-10hp but the real "feeling" is more because it switches your powerband down low...

did you read the thread about the Y pipe on the NA engine and how it achieves two peaks across it's powerband???

how does this apply with the cams. i thought the cams where the same and this was the differance in low and high end for the cars.

just asking, since i really don't know very much about this

also if i just pull the cams from my spare NA engine can i slap them right into the turbo head i have without any extra parts required??

john

 

[Squid699]

well yeah obviously in your case thats all fine and good lol MR NA-T lol

but a lot of STOCK turbo guys are putting NA cams in...so i figured i would clarify for them

NA-T is a bit of a misnomer......it's a *slightly* modded 7mgte out of a 91

 

[bkubisht]

I'm new here, and new to supras. I'm researching puting a 7mge into my toy truck. Since there's no archives, I get to ask a possibly dumb question...

I see it's desirable to swap the 7MGE camshafts into the 7MGTE. Is this because there's more duration on the 7MGE's, and you guys are looking for a setup that revs sky high?

If so, has anyone heard of making a low-rpm torque truck motor using 7MGE with turbo cams?

EDIT: Oh, and it's a 4x4 mountain climber, not a 2wd drag truck.

 

[Idealsupra]

merged this question in here.... hope you get your answers...

 

[DEFIANT 7M]

Can anyone shed some light on this?

Aust delivered supra (MA70)
intake open 6deg BTDC close 54deg ABDC
ex open 54deg BBDC close 6deg ATDC

Aust delivered Cressida (MX83)
intake open 6deg BTDC close 40deg ABDC
ex open 53deg BBDC close 3deg ATDC

 

[Idealsupra]

Can anyone shed some light on this?

Aust delivered supra (MA70)
intake open 6deg BTDC close 54deg ABDC
ex open 54deg BBDC close 6deg ATDC

Aust delivered Cressida (MX83)
intake open 6deg BTDC close 40deg ABDC
ex open 53deg BBDC close 3deg ATDC

is that a turbo supra or NA supra? the cressida i would assume is using the NA cams while the turbo supra is obviously using turbo cams....

otherwise...i dont know and would like info as well

 

[shaeff]

I see it's desirable to swap the 7MGE camshafts into the 7MGTE. Is this because there's more duration on the 7MGE's, and you guys are looking for a setup that revs sky high?

i havent seen this mentioned in here, it's not BOTH N/A cams that are supposed to be put in the Turbo head, its just the intake cam. really, from everything i've read, it just moves the powerband a bit.

the cams really dont have a whole lot to do with our redline, thats more the crank. i'm sure the cams could take a crapload of revs, but the crank is our worry, if any. i'd say a 7m could rev to about 7k -7500k rpm safely, with stock internals. that is, of course, my opinion. (and we're limited to 6500 for pre 89 and 6250 for 89 + if i remember correctly)

-shaeff