Ported oem heads vs aftermarket heads

AdzyHany · 02-17-2021, 10:10 PM

Hey guys.

I’m looking to spice up my 6mt 21’ 1LE. I know whp is just a number but I’m looking to get to 550 plus a 100 shot. I plan to do full bolt ons and heads/cam and tune. Will ported oem heads get me there? We don’t have E85 up here in Canada but I can get 94 octane from the pump. Thanks guys

MrNoosNoos · 02-17-2021, 11:40 PM

If you're going ported OEM heads, I would talk to PRAY performance about porting. Currently FBO E85 + cam @ 530 whp, adding ported manifold, mast heads, and pistons/rods. Hoping for 550+

NYblack1le · 02-18-2021, 05:30 AM

I have CID heads with my n/a setup. I’m over 600whp with an msd manifold. Stock ported heads will get you where you need to be. Hit up Zack or James at GPI and let them know what you’re looking to do.

danhr · 02-18-2021, 08:03 AM

if you want to go the ported oem route, pray performance hands down is the place to go. Some of his factory ported heads put big dog LS7 heads to shame. I believe his top two OEM ported heads flow 400+ CFM, which is just straight up ridiculous.

KingLT1 · 02-18-2021, 08:31 AM

LT1 heads have some valves issues that seem to show up when you increase spring pressure, cam lobe intensity, and RPM. I believe Pray is around 4500.00 for a fully reworked set of ported OEM castings(New valve seats, valves, valve job, porting, springs...etc). However once he is done with them they seem to perform as good if not better then aftermarket stuff and even LS7 stuff as Dan mentioned.

I am not saying you can't get away with a port and valve job with new springs and hardware. Going that route is probably ok on something mild staying under 7k rpm. But if you are considering a more aggressive H/C setup with Nitrous on top it might be something to consider. Contact GPI or Pray and tell them what you are looking to do.

Chris V · 02-18-2021, 10:47 AM

Quote:

Originally Posted by NYblack1le

I have CID heads with my n/a setup. I’m over 600whp with an msd manifold. Stock ported heads will get you where you need to be. Hit up Zack or James at GPI and let them know what you’re looking to do.

Stock bottom end?

NYblack1le · 02-18-2021, 11:51 AM

Quote:

Originally Posted by Chris V

Stock bottom end?

Gpi piston/rod.

MrNoosNoos · 02-19-2021, 08:15 PM

Quote:

Originally Posted by NYblack1le

I have CID heads with my n/a setup. I’m over 600whp with an msd manifold. Stock ported heads will get you where you need to be. Hit up Zack or James at GPI and let them know what you’re looking to do.

Mod list?

Nevermind, I found it! Is the ATI dampener worth it?

LT1ornothing · 02-19-2021, 11:01 PM

Quote:

Originally Posted by MrNoosNoos

Mod list?

Nevermind, I found it! Is the ATI dampener worth it?

It is worth it if your goal is all the available naturally aspirated power, Kind of a hidden nook in the cranny. I feel like it adds around +10 rwhp with EVERY other NA supporting mod.

NYblack1le · 02-20-2021, 05:54 AM

Quote:

Originally Posted by MrNoosNoos

Mod list?

Nevermind, I found it! Is the ATI dampener worth it?

It depends on what you’re willing to spend to free up those last few ponies. I’m debating whether I should go hi ram now but I really don’t wanna cut up the car.

Redlinez · 02-20-2021, 08:11 AM

Hi ram is the intake Pray's cars make the top numbers, I too ain't cutting my hood though. Ported MSD is the next step down.

MrNoosNoos · 02-21-2021, 07:36 PM

Quote:

Originally Posted by NYblack1le

It depends on what you’re willing to spend to free up those last few ponies. I’m debating whether I should go hi ram now but I really don’t wanna cut up the car.

yeah that's my main issue, cutting the hood. I'm not too fond of losing more visibility with a copo hood, plus at the end of the day its going to cost more than my ported MSD

cmitchell17 · 02-22-2021, 12:07 AM

How much compression is everyone getting with the stock heads? TSP milled mine .030 but they said thats as much as they would go and wouldn't go any further. I run full time E85 and I want to be able to take advantage of it and get my compression up to around 14 or maybe 14.5.

RobbyBeefcake87 · 02-22-2021, 10:24 AM

Quote:

Originally Posted by MrNoosNoos

yeah that's my main issue, cutting the hood. I'm not too fond of losing more visibility with a copo hood, plus at the end of the day its going to cost more than my ported MSD

I think the vfn looks a lot better than the COPO and you don't lose quite as much visibility since the cowl isn't as wide.

02-17-2021, 10:10 PM	#1
AdzyHany Drives: 2021 camaro ss 1LE Join Date: Dec 2020 Location: Canada Posts: 27	Ported oem heads vs aftermarket heads Hey guys. I’m looking to spice up my 6mt 21’ 1LE. I know whp is just a number but I’m looking to get to 550 plus a 100 shot. I plan to do full bolt ons and heads/cam and tune. Will ported oem heads get me there? We don’t have E85 up here in Canada but I can get 94 octane from the pump. Thanks guys

02-18-2021, 08:03 AM	#4
danhr BAMF SS Drives: 2016 Camaro 1SS A8 Join Date: Mar 2010 Location: Ford City, PA Posts: 3,023	if you want to go the ported oem route, pray performance hands down is the place to go. Some of his factory ported heads put big dog LS7 heads to shame. I believe his top two OEM ported heads flow 400+ CFM, which is just straight up ridiculous. __________________ 2016 1SS A8: FBO + Circle D + P1X + Meth + Tuned by Pray Performance Stock Longblock 800 SAE rwhp. 9.4 @ 145 mph.

02-18-2021, 08:31 AM	#5
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,793	LT1 heads have some valves issues that seem to show up when you increase spring pressure, cam lobe intensity, and RPM. I believe Pray is around 4500.00 for a fully reworked set of ported OEM castings(New valve seats, valves, valve job, porting, springs...etc). However once he is done with them they seem to perform as good if not better then aftermarket stuff and even LS7 stuff as Dan mentioned. I am not saying you can't get away with a port and valve job with new springs and hardware. Going that route is probably ok on something mild staying under 7k rpm. But if you are considering a more aggressive H/C setup with Nitrous on top it might be something to consider. Contact GPI or Pray and tell them what you are looking to do. __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

02-20-2021, 08:11 AM	#11
Redlinez Shifts under load Drives: 2020 Camaro 1SS 1LE rally green Join Date: Apr 2017 Location: Fuquay-Varina, NC Posts: 1,295	Hi ram is the intake Pray's cars make the top numbers, I too ain't cutting my hood though. Ported MSD is the next step down. __________________ 24 Audi S3 prem plus, sport package HPDE - southeast - JTI- solo, PCA- blue. 22 Suzuki GSX-S 1000GT blue

02-17-2021, 11:40 PM	#2
MrNoosNoos Drives: 2019 Camaro 2SS 1LE Join Date: Jan 2019 Location: Atlanta Posts: 68 View My Garage	If you're going ported OEM heads, I would talk to PRAY performance about porting. Currently FBO E85 + cam @ 530 whp, adding ported manifold, mast heads, and pistons/rods. Hoping for 550+

02-18-2021, 05:30 AM	#3
NYblack1le Drives: 2018 1SS 1LE Join Date: Dec 2012 Location: NY Posts: 395	I have CID heads with my n/a setup. I’m over 600whp with an msd manifold. Stock ported heads will get you where you need to be. Hit up Zack or James at GPI and let them know what you’re looking to do.

02-22-2021, 12:07 AM	#13
cmitchell17 Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016 Location: US Posts: 1,200	How much compression is everyone getting with the stock heads? TSP milled mine .030 but they said thats as much as they would go and wouldn't go any further. I run full time E85 and I want to be able to take advantage of it and get my compression up to around 14 or maybe 14.5.

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