Dissapointed w/ texas speed prc 227 heads and ms4 cam dyno results
12-03-2017, 12:16 PM
#1
On The Tree
Thread Starter
iTrader: (1)
Join Date: Jan 2014
Location: new jersey
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
Dissapointed w/ texas speed prc 227 heads and ms4 cam dyno results FIRST OFF I AM IN NO WAY BASHING ANY OF TSP PRODUCTS OR THERE COMPANY.
So i went with a Heads and cam package from texas speed. i have prc227 heads with ms4 cam along with thieir 1 7/8 long tubee headers and y pipe with borla exhasut. when getting tuned car only put down 381 whp . what really disapointed me and caused some concern tho was how the car only peaked at 5800 then fell on its face all the way up to 6500. car didnt even hold its power thru the pull.. My tuner tells me i should swap out the cam with a Trex but that is just his preferance in cam choice. And il probably benefit in Hp from a 92 intake/Tb.
What are ur guys thoughts? Motor is stock bottom end ws6 with ls6 intake? . Could it be possible the cam was just ground wrong??? maybe valve train issue somewhere.
So i went with a Heads and cam package from texas speed. i have prc227 heads with ms4 cam along with thieir 1 7/8 long tubee headers and y pipe with borla exhasut. when getting tuned car only put down 381 whp . what really disapointed me and caused some concern tho was how the car only peaked at 5800 then fell on its face all the way up to 6500. car didnt even hold its power thru the pull.. My tuner tells me i should swap out the cam with a Trex but that is just his preferance in cam choice. And il probably benefit in Hp from a 92 intake/Tb.
What are ur guys thoughts? Motor is stock bottom end ws6 with ls6 intake? . Could it be possible the cam was just ground wrong??? maybe valve train issue somewhere.
Last edited by bnastystuntz; 12-04-2017 at 01:00 PM.
12-03-2017, 01:47 PM
#3
On The Tree
Thread Starter
iTrader: (1)
Join Date: Jan 2014
Location: new jersey
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
It is a Mustang dyno . Not worried bout the hp number . i mean it is going thru a th400 and 9 inch .my concern tho is that its only peakin at 5800 then just falls on its face
Last edited by bnastystuntz; 12-04-2017 at 02:00 PM.
12-03-2017, 02:02 PM
#5
With the graph peaking so low, thats a huge issue. Something is wrong. The trex likely wont gain much vs that ms4 also.
There is something else wrong. Either cam installed advanced or pushrod length not right.
That cam should pull to at least 6400 with no issues even on an ls6 intake. More likely 6500-6600. Either there is something wrong with the tune, fuel system/inj, or install.
What injectors are you running and what fuel pump?
That combo should be in the 430s range.
There is something else wrong. Either cam installed advanced or pushrod length not right.
That cam should pull to at least 6400 with no issues even on an ls6 intake. More likely 6500-6600. Either there is something wrong with the tune, fuel system/inj, or install.
What injectors are you running and what fuel pump?
That combo should be in the 430s range.
12-03-2017, 02:12 PM
#7
On The Tree
Thread Starter
iTrader: (1)
Join Date: Jan 2014
Location: new jersey
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
With the graph peaking so low, thats a huge issue. Something is wrong. The trex likely wont gain much vs that ms4 also.
There is something else wrong. Either cam installed advanced or pushrod length not right.
That cam should pull to at least 6400 with no issues even on an ls6 intake. More likely 6500-6600. Either there is something wrong with the tune, fuel system/inj, or install.
What injectors are you running and what fuel pump?
That combo should be in the 430s range.
There is something else wrong. Either cam installed advanced or pushrod length not right.
That cam should pull to at least 6400 with no issues even on an ls6 intake. More likely 6500-6600. Either there is something wrong with the tune, fuel system/inj, or install.
What injectors are you running and what fuel pump?
That combo should be in the 430s range.
Trending Topics
12-03-2017, 02:58 PM
#11
On The Tree
Thread Starter
iTrader: (1)
Join Date: Jan 2014
Location: new jersey
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
im going to check timing marks. its a possibility that im off a tooth. pr length. when i installed the cam the length was good. checked with a pr length checker. but i am def going to recheck everything...
Imm see what Tsp says tomorrow when i give them a call. Figure il get some input from them as well. i just wanted to throw up a post to if anyone had some suggestions
Imm see what Tsp says tomorrow when i give them a call. Figure il get some input from them as well. i just wanted to throw up a post to if anyone had some suggestions
12-03-2017, 03:10 PM
#12
On The Tree
Thread Starter
iTrader: (1)
Join Date: Jan 2014
Location: new jersey
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
im running a stock ls1 timing set with ls2 chain. Are u saying that i put the cam in a tooth off or that the cam was ground with too much advance??
12-03-2017, 03:20 PM
#13
TECH Enthusiast
iTrader: (19)
Join Date: Dec 2006
Location: Lynchburg, Va
Posts: 516
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by bnastystuntz;19[LIST
[/LIST]783748]got a good deal on them plus i didnt want to have to swap inj when i put on the procharger later on.
12-03-2017, 03:37 PM
#14
On The Tree
Thread Starter
iTrader: (1)
Join Date: Jan 2014
Location: new jersey
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
yea but my a/f ration was able to stay in the 12.5 to 12.8 range. i would think if it had to do with the injector it would show in the a/f reading
12-03-2017, 04:15 PM
#15
Moderator
iTrader: (4)
Join Date: Jul 2014
Location: My own internal universe
Posts: 10,446
Received 1,835 Likes
on
1,145 Posts
Originally Posted by bnastystuntz
im running a stock ls1 timing set with ls2 chain. Are u saying that i put the cam in a tooth off or that the cam was ground with too much advance??
Cams can be off so can sets. The new set takes that out. Then if you degree the cam and it is off but you know the dots are right, you can call TSP and I am sure they will take care of you. Or you can take it somewhere with a cam doctor to read the cam and tell you what it is. Either way, with your combo peak tq should be 4800 rpm and hp should be 6300 rpm.
12-03-2017, 04:36 PM
#16
1 tooth off can be from 4 to 8 degrees.
I've measured and have seen quite a few tsp cams measured. At most ive seen them off by 1* but only once. normally 1/2* is most and good luck tryin to make sure you measured that right lol.
So its likely with the horrible thumb mark on the cam gear and little dot on the crank gear you could be off OR any extra play in the crank gear or loose cam bolts that werent lock tited also.
I've measured and have seen quite a few tsp cams measured. At most ive seen them off by 1* but only once. normally 1/2* is most and good luck tryin to make sure you measured that right lol.
So its likely with the horrible thumb mark on the cam gear and little dot on the crank gear you could be off OR any extra play in the crank gear or loose cam bolts that werent lock tited also.
12-03-2017, 05:09 PM
#18
On The Tree
Thread Starter
iTrader: (1)
Join Date: Jan 2014
Location: new jersey
Posts: 168
Likes: 0
Received 0 Likes
on
0 Posts
1 tooth off can be from 4 to 8 degrees.
I've measured and have seen quite a few tsp cams measured. At most ive seen them off by 1* but only once. normally 1/2* is most and good luck tryin to make sure you measured that right lol.
So its likely with the horrible thumb mark on the cam gear and little dot on the crank gear you could be off OR any extra play in the crank gear or loose cam bolts that werent lock tited also.
I've measured and have seen quite a few tsp cams measured. At most ive seen them off by 1* but only once. normally 1/2* is most and good luck tryin to make sure you measured that right lol.
So its likely with the horrible thumb mark on the cam gear and little dot on the crank gear you could be off OR any extra play in the crank gear or loose cam bolts that werent lock tited also.
12-03-2017, 07:50 PM
#19
TECH Enthusiast
iTrader: (19)
Join Date: Dec 2006
Location: Lynchburg, Va
Posts: 516
Likes: 0
Received 0 Likes
on
0 Posts
AFR has nothing to do with injector spray pattern, im saying those injectors are way too big for that power, you want to get an injector that is around 80% DC at the desired power level, with 80s at less than 400 you should be closer to the 42-60 range. they will cause problems too large from what I have seen.
