Installation of crossover manifold !!
Installation of crossover manifold !!
After a long delay due to cold weather, then pollen storms, and finally monsoons I got to replacing my intake manifold. I modified the larger Needswings intakes to include crossovers for better breather.
It took me an hour to do the swap, and then a quick trip around the block to confirm that everything was working as intended.
Details:
Pulling the manifold was easy as I glue the gaskets to the engine and add grease on the manifold side, so the gaskets typically can be reused. The driver side gasket was warped and had a 1/32” leak that was not noticable. The engine had thrown a code once for a higher than expected idle. Interesting.
I would have been done sooner but I had to drill and tap two vacuum ports for my electronic vacuum/boost gauge, fuel pressure management system which adjusts the rail fuel pressure. The installation was easy and the design that Rob came up with was very superior to my initial approach. It was necessary for me to fight the crossover hoses, this new design was easy pezie, well done Rob.
The appearance is very attractive, functional, and well thought out. I can not attest to the improvement power wise, but it sounds good and I believe the exhaust is a bit more present in tone.
If you want about 20 more HP, this is a no stress way to your goal. Pullys give you more boost at the stress on the idlers and belt. With this manifold the boost YOU SEE will be lower than you have had before, BECAUSE THERE IS BETTER FLOW AND LESS BACK UP RESTRICTION IN THE MANIFOLDS. A gain in power and a bit more response, whats not to like.
The album has the photos of the installation and some details about my approach to this project. Please take a see:
https://www.crossfireforum.org/g/album/9974883
Enjoy WDY
It took me an hour to do the swap, and then a quick trip around the block to confirm that everything was working as intended.
Details:
Pulling the manifold was easy as I glue the gaskets to the engine and add grease on the manifold side, so the gaskets typically can be reused. The driver side gasket was warped and had a 1/32” leak that was not noticable. The engine had thrown a code once for a higher than expected idle. Interesting.
I would have been done sooner but I had to drill and tap two vacuum ports for my electronic vacuum/boost gauge, fuel pressure management system which adjusts the rail fuel pressure. The installation was easy and the design that Rob came up with was very superior to my initial approach. It was necessary for me to fight the crossover hoses, this new design was easy pezie, well done Rob.
The appearance is very attractive, functional, and well thought out. I can not attest to the improvement power wise, but it sounds good and I believe the exhaust is a bit more present in tone.
If you want about 20 more HP, this is a no stress way to your goal. Pullys give you more boost at the stress on the idlers and belt. With this manifold the boost YOU SEE will be lower than you have had before, BECAUSE THERE IS BETTER FLOW AND LESS BACK UP RESTRICTION IN THE MANIFOLDS. A gain in power and a bit more response, whats not to like.
The album has the photos of the installation and some details about my approach to this project. Please take a see:
https://www.crossfireforum.org/g/album/9974883
Enjoy WDY
Last edited by waldig; 06-07-2018 at 07:46 PM.
Re: Installation of crossover manifold !!
Thanks
Re: Installation of crossover manifold !!
Thanks for the clarification! However, I don't have stock manifolds, I have the tweaked Needswings manifolds. So, I still don't now if it's clearly beneficial to upgrade. I DON"T want to irritate you or anyone else. I'm very very grateful for your contributions to this great car.
Re: Installation of crossover manifold !!
I apologize for this question, but please clarify the tweeked manifolds? Are they crossover styles or just large volume manifolds with interior coating?
The larger manifolds increase power. The crossover manifolds add an additional 20 HP or so manifolds over the larger manifolds.
Were approaching the end of the line for upgrades and each revision is drawing from the well the last bits of power available to be had. Its been an interesting and long path. I started on 9/11/2010 when I got my crossfire thru Ebay.
Enjoy, Woody
The larger manifolds increase power. The crossover manifolds add an additional 20 HP or so manifolds over the larger manifolds.
Were approaching the end of the line for upgrades and each revision is drawing from the well the last bits of power available to be had. Its been an interesting and long path. I started on 9/11/2010 when I got my crossfire thru Ebay.
Enjoy, Woody
Re: Installation of crossover manifold !!
I apologize for this question, but please clarify the tweeked manifolds? Are they crossover styles or just large volume manifolds with interior coating?
The larger manifolds increase power. The crossover manifolds add an additional 20 HP or so manifolds over the larger manifolds.
Were approaching the end of the line for upgrades and each revision is drawing from the well the last bits of power available to be had. Its been an interesting and long path. I started on 9/11/2010 when I got my crossfire thru Ebay.
Enjoy, Woody
The larger manifolds increase power. The crossover manifolds add an additional 20 HP or so manifolds over the larger manifolds.
Were approaching the end of the line for upgrades and each revision is drawing from the well the last bits of power available to be had. Its been an interesting and long path. I started on 9/11/2010 when I got my crossfire thru Ebay.
Enjoy, Woody
Last edited by JEFASOLD; 06-15-2018 at 02:02 PM.
Re: Installation of crossover manifold !!
Hi Jim, Can you let us know about your experience with the crossovers, and what if any changes it makes to power, fuel flow and air/fuel ratio? I'm hoping that the lower relative manifold pressure spikes will ease fuel flow since I'm at the end of the road without major fuel system changes.
thanks
Dave
thanks
Dave
Re: Installation of crossover manifold !!
definitely alot more than a chevy cam, LoL
Thread
Thread Starter
Forum
Replies
Last Post
Don Hiltz
Engine, Exhaust, Transmission and Differential
1
02-28-2009 05:27 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)